Add custom refresh rate mode to VSync option (#238)

Rebased @jcm93's refreshinterval branch:
https://github.com/jcm93/Ryujinx/tree/refreshinterval

The option is placed under System/Hacks. Disabled, it's the default
Ryujinx behavior. Enabled, the behavior is shown in the attached
screenshots. If a framerate is too high or low, you can adjust the value
where you normally toggle VSync on and off. It will also cycle through
the default on/off toggles.

Also, in order to reduce clutter, I made an adjustment to remove the
target FPS and only show the percentage.

---------

Co-authored-by: jcm <6864788+jcm93@users.noreply.github.com>

src/Ryujinx.Common/Configuration/Hid/KeyboardHotkeys.cs

@@ -2,7 +2,7 @@ namespace Ryujinx.Common.Configuration.Hid
 {
     public class KeyboardHotkeys
     {
-        public Key ToggleVsync { get; set; }
+        public Key ToggleVSyncMode { get; set; }
         public Key Screenshot { get; set; }
         public Key ShowUI { get; set; }
         public Key Pause { get; set; }
@@ -11,5 +11,7 @@ namespace Ryujinx.Common.Configuration.Hid
         public Key ResScaleDown { get; set; }
         public Key VolumeUp { get; set; }
         public Key VolumeDown { get; set; }
+        public Key CustomVSyncIntervalIncrement { get; set; }
+        public Key CustomVSyncIntervalDecrement { get; set; }
     }
 }

src/Ryujinx.Common/Configuration/VSyncMode.cs

@@ -0,0 +1,9 @@
+namespace Ryujinx.Common.Configuration
+{
+    public enum VSyncMode
+    {
+        Switch,
+        Unbounded,
+        Custom
+    }
+}

src/Ryujinx.Graphics.GAL/IWindow.cs

@@ -8,7 +8,7 @@ namespace Ryujinx.Graphics.GAL
 
         void SetSize(int width, int height);
 
-        void ChangeVSyncMode(bool vsyncEnabled);
+        void ChangeVSyncMode(VSyncMode vSyncMode);
 
         void SetAntiAliasing(AntiAliasing antialiasing);
         void SetScalingFilter(ScalingFilter type);

src/Ryujinx.Graphics.GAL/Multithreading/ThreadedWindow.cs

@@ -31,7 +31,7 @@ namespace Ryujinx.Graphics.GAL.Multithreading
             _impl.Window.SetSize(width, height);
         }
 
-        public void ChangeVSyncMode(bool vsyncEnabled) { }
+        public void ChangeVSyncMode(VSyncMode vSyncMode) { }
 
         public void SetAntiAliasing(AntiAliasing effect) { }
 

src/Ryujinx.Graphics.GAL/VSyncMode.cs

@@ -0,0 +1,9 @@
+namespace Ryujinx.Graphics.GAL
+{
+    public enum VSyncMode
+    {
+        Switch,
+        Unbounded,
+        Custom
+    }
+}

src/Ryujinx.Graphics.OpenGL/Window.cs

@@ -54,7 +54,7 @@ namespace Ryujinx.Graphics.OpenGL
             GL.PixelStore(PixelStoreParameter.UnpackAlignment, 4);
         }
 
-        public void ChangeVSyncMode(bool vsyncEnabled) { }
+        public void ChangeVSyncMode(VSyncMode vSyncMode) { }
 
         public void SetSize(int width, int height)
         {

src/Ryujinx.Graphics.Vulkan/Window.cs

@@ -29,7 +29,7 @@ namespace Ryujinx.Graphics.Vulkan
 
         private int _width;
         private int _height;
-        private bool _vsyncEnabled;
+        private VSyncMode _vSyncMode;
         private bool _swapchainIsDirty;
         private VkFormat _format;
         private AntiAliasing _currentAntiAliasing;
@@ -139,7 +139,7 @@ namespace Ryujinx.Graphics.Vulkan
                 ImageArrayLayers = 1,
                 PreTransform = capabilities.CurrentTransform,
                 CompositeAlpha = ChooseCompositeAlpha(capabilities.SupportedCompositeAlpha),
-                PresentMode = ChooseSwapPresentMode(presentModes, _vsyncEnabled),
+                PresentMode = ChooseSwapPresentMode(presentModes, _vSyncMode),
                 Clipped = true,
             };
 
@@ -279,9 +279,9 @@ namespace Ryujinx.Graphics.Vulkan
             }
         }
 
-        private static PresentModeKHR ChooseSwapPresentMode(PresentModeKHR[] availablePresentModes, bool vsyncEnabled)
+        private static PresentModeKHR ChooseSwapPresentMode(PresentModeKHR[] availablePresentModes, VSyncMode vSyncMode)
         {
-            if (!vsyncEnabled && availablePresentModes.Contains(PresentModeKHR.ImmediateKhr))
+            if (vSyncMode == VSyncMode.Unbounded && availablePresentModes.Contains(PresentModeKHR.ImmediateKhr))
             {
                 return PresentModeKHR.ImmediateKhr;
             }
@@ -634,9 +634,10 @@ namespace Ryujinx.Graphics.Vulkan
             _swapchainIsDirty = true;
         }
 
-        public override void ChangeVSyncMode(bool vsyncEnabled)
+        public override void ChangeVSyncMode(VSyncMode vSyncMode)
         {
-            _vsyncEnabled = vsyncEnabled;
+            _vSyncMode = vSyncMode;
+            //present mode may change, so mark the swapchain for recreation
             _swapchainIsDirty = true;
         }
 

src/Ryujinx.Graphics.Vulkan/WindowBase.cs

@@ -10,7 +10,7 @@ namespace Ryujinx.Graphics.Vulkan
         public abstract void Dispose();
         public abstract void Present(ITexture texture, ImageCrop crop, Action swapBuffersCallback);
         public abstract void SetSize(int width, int height);
-        public abstract void ChangeVSyncMode(bool vsyncEnabled);
+        public abstract void ChangeVSyncMode(VSyncMode vSyncMode);
         public abstract void SetAntiAliasing(AntiAliasing effect);
         public abstract void SetScalingFilter(ScalingFilter scalerType);
         public abstract void SetScalingFilterLevel(float scale);

src/Ryujinx.HLE/HLEConfiguration.cs

@@ -9,6 +9,7 @@ using Ryujinx.HLE.HOS.Services.Account.Acc;
 using Ryujinx.HLE.HOS.SystemState;
 using Ryujinx.HLE.UI;
 using System;
+using VSyncMode = Ryujinx.Common.Configuration.VSyncMode;
 
 namespace Ryujinx.HLE
 {
@@ -84,9 +85,14 @@ namespace Ryujinx.HLE
         internal readonly RegionCode Region;
 
         /// <summary>
-        /// Control the initial state of the vertical sync in the SurfaceFlinger service.
+        /// Control the initial state of the present interval in the SurfaceFlinger service (previously Vsync).
         /// </summary>
-        internal readonly bool EnableVsync;
+        internal readonly VSyncMode VSyncMode;
+
+        /// <summary>
+        /// Control the custom VSync interval, if enabled and active.
+        /// </summary>
+        internal readonly int CustomVSyncInterval;
 
         /// <summary>
         /// Control the initial state of the docked mode.
@@ -195,7 +201,7 @@ namespace Ryujinx.HLE
                                 IHostUIHandler hostUIHandler,
                                 SystemLanguage systemLanguage,
                                 RegionCode region,
-                                bool enableVsync,
+                                VSyncMode vSyncMode,
                                 bool enableDockedMode,
                                 bool enablePtc,
                                 bool enableInternetAccess,
@@ -212,7 +218,8 @@ namespace Ryujinx.HLE
                                 MultiplayerMode multiplayerMode,
                                 bool multiplayerDisableP2p,
                                 string multiplayerLdnPassphrase,
-                                string multiplayerLdnServer)
+                                string multiplayerLdnServer,
+                                int customVSyncInterval)
         {
             VirtualFileSystem = virtualFileSystem;
             LibHacHorizonManager = libHacHorizonManager;
@@ -225,7 +232,8 @@ namespace Ryujinx.HLE
             HostUIHandler = hostUIHandler;
             SystemLanguage = systemLanguage;
             Region = region;
-            EnableVsync = enableVsync;
+            VSyncMode = vSyncMode;
+            CustomVSyncInterval = customVSyncInterval;
             EnableDockedMode = enableDockedMode;
             EnablePtc = enablePtc;
             EnableInternetAccess = enableInternetAccess;

src/Ryujinx.HLE/HOS/Services/SurfaceFlinger/SurfaceFlinger.cs

@@ -10,13 +10,12 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using System.Threading;
+using VSyncMode = Ryujinx.Common.Configuration.VSyncMode;
 
 namespace Ryujinx.HLE.HOS.Services.SurfaceFlinger
 {
     class SurfaceFlinger : IConsumerListener, IDisposable
     {
-        private const int TargetFps = 60;
-
         private readonly Switch _device;
 
         private readonly Dictionary<long, Layer> _layers;
@@ -32,6 +31,9 @@ namespace Ryujinx.HLE.HOS.Services.SurfaceFlinger
         private readonly long _spinTicks;
         private readonly long _1msTicks;
 
+        private VSyncMode _vSyncMode;
+        private long _targetVSyncInterval;
+
         private int _swapInterval;
         private int _swapIntervalDelay;
 
@@ -88,7 +90,8 @@ namespace Ryujinx.HLE.HOS.Services.SurfaceFlinger
             }
             else
             {
-                _ticksPerFrame = Stopwatch.Frequency / TargetFps;
+                _ticksPerFrame = Stopwatch.Frequency / _device.TargetVSyncInterval;
+                _targetVSyncInterval = _device.TargetVSyncInterval;
             }
         }
 
@@ -370,15 +373,20 @@ namespace Ryujinx.HLE.HOS.Services.SurfaceFlinger
 
                 if (acquireStatus == Status.Success)
                 {
-                    // If device vsync is disabled, reflect the change.
-                    if (!_device.EnableDeviceVsync)
+                    if (_device.VSyncMode == VSyncMode.Unbounded)
                     {
                         if (_swapInterval != 0)
                         {
                             UpdateSwapInterval(0);
+                            _vSyncMode = _device.VSyncMode;
                         }
                     }
-                    else if (item.SwapInterval != _swapInterval)
+                    else if (_device.VSyncMode != _vSyncMode)
+                    {
+                        UpdateSwapInterval(_device.VSyncMode == VSyncMode.Unbounded ? 0 : item.SwapInterval);
+                        _vSyncMode = _device.VSyncMode;
+                    }
+                    else if (item.SwapInterval != _swapInterval || _device.TargetVSyncInterval != _targetVSyncInterval)
                     {
                         UpdateSwapInterval(item.SwapInterval);
                     }

src/Ryujinx.HLE/Switch.cs

@@ -27,7 +27,11 @@ namespace Ryujinx.HLE
         public TamperMachine TamperMachine { get; }
         public IHostUIHandler UIHandler { get; }
 
-        public bool EnableDeviceVsync { get; set; }
+        public VSyncMode VSyncMode { get; set; } = VSyncMode.Switch;
+        public bool CustomVSyncIntervalEnabled { get; set; } = false;
+        public int CustomVSyncInterval { get; set; }
+
+        public long TargetVSyncInterval { get; set; } = 60;
 
         public bool IsFrameAvailable => Gpu.Window.IsFrameAvailable;
 
@@ -59,12 +63,14 @@ namespace Ryujinx.HLE
             System.State.SetLanguage(Configuration.SystemLanguage);
             System.State.SetRegion(Configuration.Region);
 
-            EnableDeviceVsync                       = Configuration.EnableVsync;
+            VSyncMode                               = Configuration.VSyncMode;
+            CustomVSyncInterval                     = Configuration.CustomVSyncInterval;
             System.State.DockedMode                 = Configuration.EnableDockedMode;
             System.PerformanceState.PerformanceMode = System.State.DockedMode ? PerformanceMode.Boost : PerformanceMode.Default;
             System.EnablePtc                        = Configuration.EnablePtc;
             System.FsIntegrityCheckLevel            = Configuration.FsIntegrityCheckLevel;
             System.GlobalAccessLogMode              = Configuration.FsGlobalAccessLogMode;
+            UpdateVSyncInterval();
 #pragma warning restore IDE0055
         }
 
@@ -75,6 +81,34 @@ namespace Ryujinx.HLE
             Gpu.GPFifo.DispatchCalls();
         }
 
+        public void IncrementCustomVSyncInterval()
+        {
+            CustomVSyncInterval += 1;
+            UpdateVSyncInterval();
+        }
+
+        public void DecrementCustomVSyncInterval()
+        {
+            CustomVSyncInterval -= 1;
+            UpdateVSyncInterval();
+        }
+
+        public void UpdateVSyncInterval()
+        {
+            switch (VSyncMode)
+            {
+                case VSyncMode.Custom:
+                    TargetVSyncInterval = CustomVSyncInterval;
+                    break;
+                case VSyncMode.Switch:
+                    TargetVSyncInterval = 60;
+                    break;
+                case VSyncMode.Unbounded:
+                    TargetVSyncInterval = 1;
+                    break;
+            }
+        }
+
         public bool LoadCart(string exeFsDir, string romFsFile = null) => Processes.LoadUnpackedNca(exeFsDir, romFsFile);
         public bool LoadXci(string xciFile, ulong applicationId = 0) => Processes.LoadXci(xciFile, applicationId);
         public bool LoadNca(string ncaFile) => Processes.LoadNca(ncaFile);

src/Ryujinx.Headless.SDL2/Options.cs

@@ -115,8 +115,11 @@ namespace Ryujinx.Headless.SDL2
         [Option("fs-global-access-log-mode", Required = false, Default = 0, HelpText = "Enables FS access log output to the console.")]
         public int FsGlobalAccessLogMode { get; set; }
 
-        [Option("disable-vsync", Required = false, HelpText = "Disables Vertical Sync.")]
-        public bool DisableVSync { get; set; }
+        [Option("vsync-mode", Required = false, Default = VSyncMode.Switch, HelpText = "Sets the emulated VSync mode (Switch, Unbounded, or Custom).")]
+        public VSyncMode VSyncMode { get; set; }
+
+        [Option("custom-refresh-rate", Required = false, Default = 90, HelpText = "Sets the custom refresh rate target value (integer).")]
+        public int CustomVSyncInterval { get; set; }
 
         [Option("disable-shader-cache", Required = false, HelpText = "Disables Shader cache.")]
         public bool DisableShaderCache { get; set; }

src/Ryujinx.Headless.SDL2/Program.cs

@@ -563,7 +563,7 @@ namespace Ryujinx.Headless.SDL2
                 window,
                 options.SystemLanguage,
                 options.SystemRegion,
-                !options.DisableVSync,
+                options.VSyncMode,
                 !options.DisableDockedMode,
                 !options.DisablePTC,
                 options.EnableInternetAccess,
@@ -580,7 +580,8 @@ namespace Ryujinx.Headless.SDL2
                 Common.Configuration.Multiplayer.MultiplayerMode.Disabled,
                 false,
                 "",
-                "");
+                "",
+                options.CustomVSyncInterval);
 
             return new Switch(configuration);
         }

src/Ryujinx.Headless.SDL2/StatusUpdatedEventArgs.cs

@@ -3,7 +3,7 @@ using System;
 namespace Ryujinx.Headless.SDL2
 {
     class StatusUpdatedEventArgs(
-        bool vSyncEnabled,
+        string vSyncMode,
         string dockedMode,
         string aspectRatio,
         string gameStatus,
@@ -11,7 +11,7 @@ namespace Ryujinx.Headless.SDL2
         string gpuName)
         : EventArgs
     {
-        public bool VSyncEnabled = vSyncEnabled;
+        public string VSyncMode = vSyncMode;
         public string DockedMode = dockedMode;
         public string AspectRatio = aspectRatio;
         public string GameStatus = gameStatus;

src/Ryujinx.Headless.SDL2/WindowBase.cs

@@ -314,7 +314,7 @@ namespace Ryujinx.Headless.SDL2
                         }
 
                         StatusUpdatedEvent?.Invoke(this, new StatusUpdatedEventArgs(
-                            Device.EnableDeviceVsync,
+                            Device.VSyncMode.ToString(),
                             dockedMode,
                             Device.Configuration.AspectRatio.ToText(),
                             $"Game: {Device.Statistics.GetGameFrameRate():00.00} FPS ({Device.Statistics.GetGameFrameTime():00.00} ms)",

src/Ryujinx.UI.Common/Configuration/ConfigurationFileFormat.cs

@@ -1,3 +1,4 @@
+using Ryujinx.Common;
 using Ryujinx.Common.Configuration;
 using Ryujinx.Common.Configuration.Hid;
 using Ryujinx.Common.Configuration.Multiplayer;
@@ -16,7 +17,7 @@ namespace Ryujinx.UI.Common.Configuration
         /// <summary>
         /// The current version of the file format
         /// </summary>
-        public const int CurrentVersion = 56;
+        public const int CurrentVersion = 57;
 
         /// <summary>
         /// Version of the configuration file format
@@ -191,8 +192,25 @@ namespace Ryujinx.UI.Common.Configuration
         /// <summary>
         /// Enables or disables Vertical Sync
         /// </summary>
+        /// <remarks>Kept for file format compatibility (to avoid possible failure when parsing configuration on old versions)</remarks>
+        /// TODO: Remove this when those older versions aren't in use anymore.
         public bool EnableVsync { get; set; }
 
+        /// <summary>
+        /// Current VSync mode; 60 (Switch), unbounded ("Vsync off"), or custom
+        /// </summary>
+        public VSyncMode VSyncMode { get; set; }
+
+        /// <summary>
+        /// Enables or disables the custom present interval
+        /// </summary>
+        public bool EnableCustomVSyncInterval { get; set; }
+
+        /// <summary>
+        /// The custom present interval value
+        /// </summary>
+        public int CustomVSyncInterval { get; set; }
+
         /// <summary>
         /// Enables or disables Shader cache
         /// </summary>

src/Ryujinx.UI.Common/Configuration/ConfigurationState.Migration.cs

@@ -82,7 +82,7 @@ namespace Ryujinx.UI.Common.Configuration
 
                 configurationFileFormat.Hotkeys = new KeyboardHotkeys
                 {
-                    ToggleVsync = Key.F1,
+                    ToggleVSyncMode = Key.F1,
                 };
 
                 configurationFileUpdated = true;
@@ -276,7 +276,7 @@ namespace Ryujinx.UI.Common.Configuration
 
                 configurationFileFormat.Hotkeys = new KeyboardHotkeys
                 {
-                    ToggleVsync = Key.F1,
+                    ToggleVSyncMode = Key.F1,
                     Screenshot = Key.F8,
                 };
 
@@ -289,7 +289,7 @@ namespace Ryujinx.UI.Common.Configuration
 
                 configurationFileFormat.Hotkeys = new KeyboardHotkeys
                 {
-                    ToggleVsync = Key.F1,
+                    ToggleVSyncMode = Key.F1,
                     Screenshot = Key.F8,
                     ShowUI = Key.F4,
                 };
@@ -332,7 +332,7 @@ namespace Ryujinx.UI.Common.Configuration
 
                 configurationFileFormat.Hotkeys = new KeyboardHotkeys
                 {
-                    ToggleVsync = configurationFileFormat.Hotkeys.ToggleVsync,
+                    ToggleVSyncMode = configurationFileFormat.Hotkeys.ToggleVSyncMode,
                     Screenshot = configurationFileFormat.Hotkeys.Screenshot,
                     ShowUI = configurationFileFormat.Hotkeys.ShowUI,
                     Pause = Key.F5,
@@ -347,7 +347,7 @@ namespace Ryujinx.UI.Common.Configuration
 
                 configurationFileFormat.Hotkeys = new KeyboardHotkeys
                 {
-                    ToggleVsync = configurationFileFormat.Hotkeys.ToggleVsync,
+                    ToggleVSyncMode = configurationFileFormat.Hotkeys.ToggleVSyncMode,
                     Screenshot = configurationFileFormat.Hotkeys.Screenshot,
                     ShowUI = configurationFileFormat.Hotkeys.ShowUI,
                     Pause = configurationFileFormat.Hotkeys.Pause,
@@ -421,7 +421,7 @@ namespace Ryujinx.UI.Common.Configuration
 
                 configurationFileFormat.Hotkeys = new KeyboardHotkeys
                 {
-                    ToggleVsync = configurationFileFormat.Hotkeys.ToggleVsync,
+                    ToggleVSyncMode = configurationFileFormat.Hotkeys.ToggleVSyncMode,
                     Screenshot = configurationFileFormat.Hotkeys.Screenshot,
                     ShowUI = configurationFileFormat.Hotkeys.ShowUI,
                     Pause = configurationFileFormat.Hotkeys.Pause,
@@ -448,7 +448,7 @@ namespace Ryujinx.UI.Common.Configuration
 
                 configurationFileFormat.Hotkeys = new KeyboardHotkeys
                 {
-                    ToggleVsync = configurationFileFormat.Hotkeys.ToggleVsync,
+                    ToggleVSyncMode = configurationFileFormat.Hotkeys.ToggleVSyncMode,
                     Screenshot = configurationFileFormat.Hotkeys.Screenshot,
                     ShowUI = configurationFileFormat.Hotkeys.ShowUI,
                     Pause = configurationFileFormat.Hotkeys.Pause,
@@ -611,6 +611,33 @@ namespace Ryujinx.UI.Common.Configuration
                 configurationFileUpdated = true;
             }
 
+            if (configurationFileFormat.Version < 57)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 57.");
+
+                configurationFileFormat.VSyncMode = VSyncMode.Switch;
+                configurationFileFormat.EnableCustomVSyncInterval = false;
+
+                configurationFileFormat.Hotkeys = new KeyboardHotkeys
+                {
+                    ToggleVSyncMode = Key.F1,
+                    Screenshot = configurationFileFormat.Hotkeys.Screenshot,
+                    ShowUI = configurationFileFormat.Hotkeys.ShowUI,
+                    Pause = configurationFileFormat.Hotkeys.Pause,
+                    ToggleMute = configurationFileFormat.Hotkeys.ToggleMute,
+                    ResScaleUp = configurationFileFormat.Hotkeys.ResScaleUp,
+                    ResScaleDown = configurationFileFormat.Hotkeys.ResScaleDown,
+                    VolumeUp = configurationFileFormat.Hotkeys.VolumeUp,
+                    VolumeDown = configurationFileFormat.Hotkeys.VolumeDown,
+                    CustomVSyncIntervalIncrement = Key.Unbound,
+                    CustomVSyncIntervalDecrement = Key.Unbound,
+                };
+
+                configurationFileFormat.CustomVSyncInterval = 120;
+
+                configurationFileUpdated = true;
+            }
+
             Logger.EnableFileLog.Value = configurationFileFormat.EnableFileLog;
             Graphics.ResScale.Value = configurationFileFormat.ResScale;
             Graphics.ResScaleCustom.Value = configurationFileFormat.ResScaleCustom;
@@ -646,7 +673,9 @@ namespace Ryujinx.UI.Common.Configuration
             ShowTitleBar.Value = configurationFileFormat.ShowTitleBar;
             EnableHardwareAcceleration.Value = configurationFileFormat.EnableHardwareAcceleration;
             HideCursor.Value = configurationFileFormat.HideCursor;
-            Graphics.EnableVsync.Value = configurationFileFormat.EnableVsync;
+            Graphics.VSyncMode.Value = configurationFileFormat.VSyncMode;
+            Graphics.EnableCustomVSyncInterval.Value = configurationFileFormat.EnableCustomVSyncInterval;
+            Graphics.CustomVSyncInterval.Value = configurationFileFormat.CustomVSyncInterval;
             Graphics.EnableShaderCache.Value = configurationFileFormat.EnableShaderCache;
             Graphics.EnableTextureRecompression.Value = configurationFileFormat.EnableTextureRecompression;
             Graphics.EnableMacroHLE.Value = configurationFileFormat.EnableMacroHLE;

src/Ryujinx.UI.Common/Configuration/ConfigurationState.Model.cs

@@ -1,4 +1,4 @@
-using ARMeilleure;
+using ARMeilleure;
 using Ryujinx.Common;
 using Ryujinx.Common.Configuration;
 using Ryujinx.Common.Configuration.Hid;
@@ -474,9 +474,19 @@ namespace Ryujinx.UI.Common.Configuration
             public ReactiveObject<string> ShadersDumpPath { get; private set; }
 
             /// <summary>
-            /// Enables or disables Vertical Sync
+            /// Toggles the present interval mode. Options are Switch (60Hz), Unbounded (previously Vsync off), and Custom, if enabled.
             /// </summary>
-            public ReactiveObject<bool> EnableVsync { get; private set; }
+            public ReactiveObject<VSyncMode> VSyncMode { get; private set; }
+
+            /// <summary>
+            /// Enables or disables the custom present interval mode.
+            /// </summary>
+            public ReactiveObject<bool> EnableCustomVSyncInterval { get; private set; }
+
+            /// <summary>
+            /// Changes the custom present interval.
+            /// </summary>
+            public ReactiveObject<int> CustomVSyncInterval { get; private set; }
 
             /// <summary>
             /// Enables or disables Shader cache
@@ -536,8 +546,12 @@ namespace Ryujinx.UI.Common.Configuration
                 AspectRatio = new ReactiveObject<AspectRatio>();
                 AspectRatio.LogChangesToValue(nameof(AspectRatio));
                 ShadersDumpPath = new ReactiveObject<string>();
-                EnableVsync = new ReactiveObject<bool>();
-                EnableVsync.LogChangesToValue(nameof(EnableVsync));
+                VSyncMode = new ReactiveObject<VSyncMode>();
+                VSyncMode.LogChangesToValue(nameof(VSyncMode));
+                EnableCustomVSyncInterval = new ReactiveObject<bool>();
+                EnableCustomVSyncInterval.LogChangesToValue(nameof(EnableCustomVSyncInterval));
+                CustomVSyncInterval = new ReactiveObject<int>();
+                CustomVSyncInterval.LogChangesToValue(nameof(CustomVSyncInterval));
                 EnableShaderCache = new ReactiveObject<bool>();
                 EnableShaderCache.LogChangesToValue(nameof(EnableShaderCache));
                 EnableTextureRecompression = new ReactiveObject<bool>();

src/Ryujinx.UI.Common/Configuration/ConfigurationState.cs

@@ -64,7 +64,9 @@ namespace Ryujinx.UI.Common.Configuration
                 ShowTitleBar = ShowTitleBar,
                 EnableHardwareAcceleration = EnableHardwareAcceleration,
                 HideCursor = HideCursor,
-                EnableVsync = Graphics.EnableVsync,
+                VSyncMode = Graphics.VSyncMode,
+                EnableCustomVSyncInterval = Graphics.EnableCustomVSyncInterval,
+                CustomVSyncInterval = Graphics.CustomVSyncInterval,
                 EnableShaderCache = Graphics.EnableShaderCache,
                 EnableTextureRecompression = Graphics.EnableTextureRecompression,
                 EnableMacroHLE = Graphics.EnableMacroHLE,
@@ -179,7 +181,9 @@ namespace Ryujinx.UI.Common.Configuration
             ShowTitleBar.Value = !OperatingSystem.IsWindows();
             EnableHardwareAcceleration.Value = true;
             HideCursor.Value = HideCursorMode.OnIdle;
-            Graphics.EnableVsync.Value = true;
+            Graphics.VSyncMode.Value = VSyncMode.Switch;
+            Graphics.CustomVSyncInterval.Value = 120;
+            Graphics.EnableCustomVSyncInterval.Value = false;
             Graphics.EnableShaderCache.Value = true;
             Graphics.EnableTextureRecompression.Value = false;
             Graphics.EnableMacroHLE.Value = true;
@@ -240,7 +244,7 @@ namespace Ryujinx.UI.Common.Configuration
             Hid.EnableMouse.Value = false;
             Hid.Hotkeys.Value = new KeyboardHotkeys
             {
-                ToggleVsync = Key.F1,
+                ToggleVSyncMode = Key.F1,
                 ToggleMute = Key.F2,
                 Screenshot = Key.F8,
                 ShowUI = Key.F4,

src/Ryujinx/AppHost.cs

@@ -57,6 +57,8 @@ using Key = Ryujinx.Input.Key;
 using MouseButton = Ryujinx.Input.MouseButton;
 using ScalingFilter = Ryujinx.Common.Configuration.ScalingFilter;
 using Size = Avalonia.Size;
+using Switch = Ryujinx.HLE.Switch;
+using VSyncMode = Ryujinx.Common.Configuration.VSyncMode;
 
 namespace Ryujinx.Ava
 {
@@ -203,6 +205,9 @@ namespace Ryujinx.Ava
             ConfigurationState.Instance.Graphics.ScalingFilter.Event += UpdateScalingFilter;
             ConfigurationState.Instance.Graphics.ScalingFilterLevel.Event += UpdateScalingFilterLevel;
             ConfigurationState.Instance.Graphics.EnableColorSpacePassthrough.Event += UpdateColorSpacePassthrough;
+            ConfigurationState.Instance.Graphics.VSyncMode.Event += UpdateVSyncMode;
+            ConfigurationState.Instance.Graphics.CustomVSyncInterval.Event += UpdateCustomVSyncIntervalValue;
+            ConfigurationState.Instance.Graphics.EnableCustomVSyncInterval.Event += UpdateCustomVSyncIntervalEnabled;
 
             ConfigurationState.Instance.System.EnableInternetAccess.Event += UpdateEnableInternetAccessState;
             ConfigurationState.Instance.Multiplayer.LanInterfaceId.Event += UpdateLanInterfaceIdState;
@@ -295,6 +300,66 @@ namespace Ryujinx.Ava
             _renderer.Window?.SetColorSpacePassthrough((bool)ConfigurationState.Instance.Graphics.EnableColorSpacePassthrough.Value);
         }
 
+        public void UpdateVSyncMode(object sender, ReactiveEventArgs<VSyncMode> e)
+        {
+            if (Device != null)
+            {
+                Device.VSyncMode = e.NewValue;
+                Device.UpdateVSyncInterval();
+            }
+            _renderer.Window?.ChangeVSyncMode((Ryujinx.Graphics.GAL.VSyncMode)e.NewValue);
+
+            _viewModel.ShowCustomVSyncIntervalPicker = (e.NewValue == VSyncMode.Custom);
+        }
+
+        public void VSyncModeToggle()
+        {
+            VSyncMode oldVSyncMode = Device.VSyncMode;
+            VSyncMode newVSyncMode = VSyncMode.Switch;
+            bool customVSyncIntervalEnabled = ConfigurationState.Instance.Graphics.EnableCustomVSyncInterval.Value;
+
+            switch (oldVSyncMode)
+            {
+                case VSyncMode.Switch:
+                    newVSyncMode = VSyncMode.Unbounded;
+                    break;
+                case VSyncMode.Unbounded:
+                    if (customVSyncIntervalEnabled)
+                    {
+                        newVSyncMode = VSyncMode.Custom;
+                    }
+                    else
+                    {
+                        newVSyncMode = VSyncMode.Switch;
+                    }
+
+                    break;
+                case VSyncMode.Custom:
+                    newVSyncMode = VSyncMode.Switch;
+                    break;
+            }
+
+            UpdateVSyncMode(this, new ReactiveEventArgs<VSyncMode>(oldVSyncMode, newVSyncMode));
+        }
+
+        private void UpdateCustomVSyncIntervalValue(object sender, ReactiveEventArgs<int> e)
+        {
+            if (Device != null)
+            {
+                Device.TargetVSyncInterval = e.NewValue;
+                Device.UpdateVSyncInterval();
+            }
+        }
+
+        private void UpdateCustomVSyncIntervalEnabled(object sender, ReactiveEventArgs<bool> e)
+        {
+            if (Device != null)
+            {
+                Device.CustomVSyncIntervalEnabled = e.NewValue;
+                Device.UpdateVSyncInterval();
+            }
+        }
+
         private void ShowCursor()
         {
             Dispatcher.UIThread.Post(() =>
@@ -505,12 +570,6 @@ namespace Ryujinx.Ava
             Device.Configuration.MultiplayerDisableP2p = e.NewValue;
         }
 
-        public void ToggleVSync()
-        {
-            Device.EnableDeviceVsync = !Device.EnableDeviceVsync;
-            _renderer.Window.ChangeVSyncMode(Device.EnableDeviceVsync);
-        }
-
         public void Stop()
         {
             _isActive = false;
@@ -864,7 +923,7 @@ namespace Ryujinx.Ava
                 _viewModel.UiHandler,
                 (SystemLanguage)ConfigurationState.Instance.System.Language.Value,
                 (RegionCode)ConfigurationState.Instance.System.Region.Value,
-                ConfigurationState.Instance.Graphics.EnableVsync,
+                ConfigurationState.Instance.Graphics.VSyncMode,
                 ConfigurationState.Instance.System.EnableDockedMode,
                 ConfigurationState.Instance.System.EnablePtc,
                 ConfigurationState.Instance.System.EnableInternetAccess,
@@ -881,7 +940,8 @@ namespace Ryujinx.Ava
                 ConfigurationState.Instance.Multiplayer.Mode,
                 ConfigurationState.Instance.Multiplayer.DisableP2p,
                 ConfigurationState.Instance.Multiplayer.LdnPassphrase,
-                ConfigurationState.Instance.Multiplayer.LdnServer));
+                ConfigurationState.Instance.Multiplayer.LdnServer,
+                ConfigurationState.Instance.Graphics.CustomVSyncInterval.Value));
         }
 
         private static IHardwareDeviceDriver InitializeAudio()
@@ -1002,7 +1062,7 @@ namespace Ryujinx.Ava
                 Device.Gpu.SetGpuThread();
                 Device.Gpu.InitializeShaderCache(_gpuCancellationTokenSource.Token);
 
-                _renderer.Window.ChangeVSyncMode(Device.EnableDeviceVsync);
+                _renderer.Window.ChangeVSyncMode((Ryujinx.Graphics.GAL.VSyncMode)Device.VSyncMode);
 
                 while (_isActive)
                 {
@@ -1063,6 +1123,7 @@ namespace Ryujinx.Ava
         {
             // Run a status update only when a frame is to be drawn. This prevents from updating the ui and wasting a render when no frame is queued.
             string dockedMode = ConfigurationState.Instance.System.EnableDockedMode ? LocaleManager.Instance[LocaleKeys.Docked] : LocaleManager.Instance[LocaleKeys.Handheld];
+            string vSyncMode = Device.VSyncMode.ToString();
 
             UpdateShaderCount();
 
@@ -1072,7 +1133,7 @@ namespace Ryujinx.Ava
             }
 
             StatusUpdatedEvent?.Invoke(this, new StatusUpdatedEventArgs(
-                Device.EnableDeviceVsync,
+                vSyncMode,
                 LocaleManager.Instance[LocaleKeys.VolumeShort] + $": {(int)(Device.GetVolume() * 100)}%",
                 dockedMode,
                 ConfigurationState.Instance.Graphics.AspectRatio.Value.ToText(),
@@ -1175,8 +1236,16 @@ namespace Ryujinx.Ava
                 {
                     switch (currentHotkeyState)
                     {
-                        case KeyboardHotkeyState.ToggleVSync:
-                            ToggleVSync();
+                        case KeyboardHotkeyState.ToggleVSyncMode:
+                            VSyncModeToggle();
+                            break;
+                        case KeyboardHotkeyState.CustomVSyncIntervalDecrement:
+                            Device.DecrementCustomVSyncInterval();
+                            _viewModel.CustomVSyncInterval -= 1;
+                            break;
+                        case KeyboardHotkeyState.CustomVSyncIntervalIncrement:
+                            Device.IncrementCustomVSyncInterval();
+                            _viewModel.CustomVSyncInterval += 1;
                             break;
                         case KeyboardHotkeyState.Screenshot:
                             ScreenshotRequested = true;
@@ -1263,9 +1332,9 @@ namespace Ryujinx.Ava
         {
             KeyboardHotkeyState state = KeyboardHotkeyState.None;
 
-            if (_keyboardInterface.IsPressed((Key)ConfigurationState.Instance.Hid.Hotkeys.Value.ToggleVsync))
+            if (_keyboardInterface.IsPressed((Key)ConfigurationState.Instance.Hid.Hotkeys.Value.ToggleVSyncMode))
             {
-                state = KeyboardHotkeyState.ToggleVSync;
+                state = KeyboardHotkeyState.ToggleVSyncMode;
             }
             else if (_keyboardInterface.IsPressed((Key)ConfigurationState.Instance.Hid.Hotkeys.Value.Screenshot))
             {
@@ -1299,6 +1368,14 @@ namespace Ryujinx.Ava
             {
                 state = KeyboardHotkeyState.VolumeDown;
             }
+            else if (_keyboardInterface.IsPressed((Key)ConfigurationState.Instance.Hid.Hotkeys.Value.CustomVSyncIntervalIncrement))
+            {
+                state = KeyboardHotkeyState.CustomVSyncIntervalIncrement;
+            }
+            else if (_keyboardInterface.IsPressed((Key)ConfigurationState.Instance.Hid.Hotkeys.Value.CustomVSyncIntervalDecrement))
+            {
+                state = KeyboardHotkeyState.CustomVSyncIntervalDecrement;
+            }
 
             return state;
         }

src/Ryujinx/Assets/Locales/en_US.json

@@ -142,9 +142,20 @@
   "SettingsTabSystemSystemLanguageLatinAmericanSpanish": "Latin American Spanish",
   "SettingsTabSystemSystemLanguageSimplifiedChinese": "Simplified Chinese",
   "SettingsTabSystemSystemLanguageTraditionalChinese": "Traditional Chinese",
-  "SettingsTabSystemSystemTimeZone": "System TimeZone:",
+  "SettingsTabSystemSystemTimeZone": "System Time Zone:",
   "SettingsTabSystemSystemTime": "System Time:",
-  "SettingsTabSystemEnableVsync": "VSync",
+  "SettingsTabSystemVSyncMode": "VSync:",
+  "SettingsTabSystemEnableCustomVSyncInterval": "Enable custom refresh rate (Experimental)",
+  "SettingsTabSystemVSyncModeSwitch": "Switch",
+  "SettingsTabSystemVSyncModeUnbounded": "Unbounded",
+  "SettingsTabSystemVSyncModeCustom": "Custom Refresh Rate",
+  "SettingsTabSystemVSyncModeTooltip": "Emulated Vertical Sync. 'Switch' emulates the Switch's refresh rate of 60Hz. 'Unbounded' is an unbounded refresh rate.",
+  "SettingsTabSystemVSyncModeTooltipCustom": "Emulated Vertical Sync. 'Switch' emulates the Switch's refresh rate of 60Hz. 'Unbounded' is an unbounded refresh rate. 'Custom' emulates the specified custom refresh rate.",
+  "SettingsTabSystemEnableCustomVSyncIntervalTooltip": "Allows the user to specify an emulated refresh rate. In some titles, this may speed up or slow down the rate of gameplay logic. In other titles, it may allow for capping FPS at some multiple of the refresh rate, or lead to unpredictable behavior. This is an experimental feature, with no guarantees for how gameplay will be affected. \n\nLeave OFF if unsure.",
+  "SettingsTabSystemCustomVSyncIntervalValueTooltip": "The custom refresh rate target value.",
+  "SettingsTabSystemCustomVSyncIntervalSliderTooltip": "The custom refresh rate, as a percentage of the normal Switch refresh rate.",
+  "SettingsTabSystemCustomVSyncIntervalPercentage": "Custom Refresh Rate %:",
+  "SettingsTabSystemCustomVSyncIntervalValue": "Custom Refresh Rate Value:",
   "SettingsTabSystemEnablePptc": "PPTC (Profiled Persistent Translation Cache)",
   "SettingsTabSystemEnableLowPowerPptc": "Low-power PPTC cache",
   "SettingsTabSystemEnableFsIntegrityChecks": "FS Integrity Checks",
@@ -153,6 +164,7 @@
   "SettingsTabSystemAudioBackendOpenAL": "OpenAL",
   "SettingsTabSystemAudioBackendSoundIO": "SoundIO",
   "SettingsTabSystemAudioBackendSDL2": "SDL2",
+  "SettingsTabSystemCustomVSyncInterval": "Interval",
   "SettingsTabSystemHacks": "Hacks",
   "SettingsTabSystemHacksNote": "May cause instability",
   "SettingsTabSystemDramSize": "DRAM size:",
@@ -720,11 +732,13 @@
   "RyujinxUpdater": "Ryujinx Updater",
   "SettingsTabHotkeys": "Keyboard Hotkeys",
   "SettingsTabHotkeysHotkeys": "Keyboard Hotkeys",
-  "SettingsTabHotkeysToggleVsyncHotkey": "Toggle VSync:",
+  "SettingsTabHotkeysToggleVSyncModeHotkey": "Toggle VSync mode:",
   "SettingsTabHotkeysScreenshotHotkey": "Screenshot:",
   "SettingsTabHotkeysShowUiHotkey": "Show UI:",
   "SettingsTabHotkeysPauseHotkey": "Pause:",
   "SettingsTabHotkeysToggleMuteHotkey": "Mute:",
+  "SettingsTabHotkeysIncrementCustomVSyncIntervalHotkey": "Raise custom refresh rate",
+  "SettingsTabHotkeysDecrementCustomVSyncIntervalHotkey": "Lower custom refresh rate",
   "ControllerMotionTitle": "Motion Control Settings",
   "ControllerRumbleTitle": "Rumble Settings",
   "SettingsSelectThemeFileDialogTitle": "Select Theme File",

src/Ryujinx/Assets/Styles/Themes.xaml

@@ -26,8 +26,9 @@
             <Color x:Key="AppListBackgroundColor">#b3ffffff</Color>
             <Color x:Key="AppListHoverBackgroundColor">#80cccccc</Color>
             <Color x:Key="SecondaryTextColor">#A0000000</Color>
-            <Color x:Key="VsyncEnabled">#FF2EEAC9</Color>
-            <Color x:Key="VsyncDisabled">#FFFF4554</Color>
+            <Color x:Key="Switch">#FF2EEAC9</Color>
+            <Color x:Key="Unbounded">#FFFF4554</Color>
+            <Color x:Key="Custom">#6483F5</Color>
         </ResourceDictionary>
         <ResourceDictionary x:Key="Light">
             <SolidColorBrush x:Key="DataGridSelectionBackgroundBrush"

src/Ryujinx/Common/KeyboardHotkeyState.cs

@@ -3,7 +3,7 @@ namespace Ryujinx.Ava.Common
     public enum KeyboardHotkeyState
     {
         None,
-        ToggleVSync,
+        ToggleVSyncMode,
         Screenshot,
         ShowUI,
         Pause,
@@ -12,5 +12,7 @@ namespace Ryujinx.Ava.Common
         ResScaleDown,
         VolumeUp,
         VolumeDown,
+        CustomVSyncIntervalIncrement,
+        CustomVSyncIntervalDecrement,
     }
 }

src/Ryujinx/UI/Models/Input/HotkeyConfig.cs

@@ -5,13 +5,13 @@ namespace Ryujinx.Ava.UI.Models.Input
 {
     public class HotkeyConfig : BaseModel
     {
-        private Key _toggleVsync;
-        public Key ToggleVsync
+        private Key _toggleVSyncMode;
+        public Key ToggleVSyncMode
         {
-            get => _toggleVsync;
+            get => _toggleVSyncMode;
             set
             {
-                _toggleVsync = value;
+                _toggleVSyncMode = value;
                 OnPropertyChanged();
             }
         }
@@ -104,11 +104,33 @@ namespace Ryujinx.Ava.UI.Models.Input
             }
         }
 
+        private Key _customVSyncIntervalIncrement;
+        public Key CustomVSyncIntervalIncrement
+        {
+            get => _customVSyncIntervalIncrement;
+            set
+            {
+                _customVSyncIntervalIncrement = value;
+                OnPropertyChanged();
+            }
+        }
+
+        private Key _customVSyncIntervalDecrement;
+        public Key CustomVSyncIntervalDecrement
+        {
+            get => _customVSyncIntervalDecrement;
+            set
+            {
+                _customVSyncIntervalDecrement = value;
+                OnPropertyChanged();
+            }
+        }
+
         public HotkeyConfig(KeyboardHotkeys config)
         {
             if (config != null)
             {
-                ToggleVsync = config.ToggleVsync;
+                ToggleVSyncMode = config.ToggleVSyncMode;
                 Screenshot = config.Screenshot;
                 ShowUI = config.ShowUI;
                 Pause = config.Pause;
@@ -117,6 +139,8 @@ namespace Ryujinx.Ava.UI.Models.Input
                 ResScaleDown = config.ResScaleDown;
                 VolumeUp = config.VolumeUp;
                 VolumeDown = config.VolumeDown;
+                CustomVSyncIntervalIncrement = config.CustomVSyncIntervalIncrement;
+                CustomVSyncIntervalDecrement = config.CustomVSyncIntervalDecrement;
             }
         }
 
@@ -124,7 +148,7 @@ namespace Ryujinx.Ava.UI.Models.Input
         {
             var config = new KeyboardHotkeys
             {
-                ToggleVsync = ToggleVsync,
+                ToggleVSyncMode = ToggleVSyncMode,
                 Screenshot = Screenshot,
                 ShowUI = ShowUI,
                 Pause = Pause,
@@ -133,6 +157,8 @@ namespace Ryujinx.Ava.UI.Models.Input
                 ResScaleDown = ResScaleDown,
                 VolumeUp = VolumeUp,
                 VolumeDown = VolumeDown,
+                CustomVSyncIntervalIncrement = CustomVSyncIntervalIncrement,
+                CustomVSyncIntervalDecrement = CustomVSyncIntervalDecrement,
             };
 
             return config;

src/Ryujinx/UI/Models/SaveModel.cs

@@ -47,7 +47,7 @@ namespace Ryujinx.Ava.UI.Models
             TitleId = info.ProgramId;
             UserId = info.UserId;
 
-            var appData = App.MainWindow.ViewModel.Applications.FirstOrDefault(x => x.IdString.Equals(TitleIdString, StringComparison.OrdinalIgnoreCase));
+            var appData = MainWindow.MainWindowViewModel.Applications.FirstOrDefault(x => x.IdString.Equals(TitleIdString, StringComparison.OrdinalIgnoreCase));
 
             InGameList = appData != null;
 

src/Ryujinx/UI/Models/StatusUpdatedEventArgs.cs

@@ -4,18 +4,17 @@ namespace Ryujinx.Ava.UI.Models
 {
     internal class StatusUpdatedEventArgs : EventArgs
     {
-        public bool VSyncEnabled { get; }
+        public string VSyncMode { get; }
         public string VolumeStatus { get; }
         public string AspectRatio { get; }
         public string DockedMode { get; }
         public string FifoStatus { get; }
         public string GameStatus { get; }
-
         public uint ShaderCount { get; }
 
-        public StatusUpdatedEventArgs(bool vSyncEnabled, string volumeStatus, string dockedMode, string aspectRatio, string gameStatus, string fifoStatus, uint shaderCount)
+        public StatusUpdatedEventArgs(string vSyncMode, string volumeStatus, string dockedMode, string aspectRatio, string gameStatus, string fifoStatus, uint shaderCount)
         {
-            VSyncEnabled = vSyncEnabled;
+            VSyncMode = vSyncMode;
             VolumeStatus = volumeStatus;
             DockedMode = dockedMode;
             AspectRatio = aspectRatio;

src/Ryujinx/UI/ViewModels/MainWindowViewModel.cs

@@ -63,6 +63,7 @@ namespace Ryujinx.Ava.UI.ViewModels
         private string _searchText;
         private Timer _searchTimer;
         private string _dockedStatusText;
+        private string _vSyncModeText;
         private string _fifoStatusText;
         private string _gameStatusText;
         private string _volumeStatusText;
@@ -80,7 +81,7 @@ namespace Ryujinx.Ava.UI.ViewModels
         private bool _showStatusSeparator;
         private Brush _progressBarForegroundColor;
         private Brush _progressBarBackgroundColor;
-        private Brush _vsyncColor;
+        private Brush _vSyncModeColor;
         private byte[] _selectedIcon;
         private bool _isAppletMenuActive;
         private int _statusBarProgressMaximum;
@@ -111,6 +112,8 @@ namespace Ryujinx.Ava.UI.ViewModels
         private WindowState _windowState;
         private double _windowWidth;
         private double _windowHeight;
+        private int _customVSyncInterval;
+        private int _customVSyncIntervalPercentageProxy;
 
         private bool _isActive;
         private bool _isSubMenuOpen;
@@ -145,6 +148,7 @@ namespace Ryujinx.Ava.UI.ViewModels
 
                 Volume = ConfigurationState.Instance.System.AudioVolume;
             }
+            CustomVSyncInterval = ConfigurationState.Instance.Graphics.CustomVSyncInterval.Value;
         }
 
         public void Initialize(
@@ -447,17 +451,87 @@ namespace Ryujinx.Ava.UI.ViewModels
             }
         }
 
-        public Brush VsyncColor
+        public Brush VSyncModeColor
         {
-            get => _vsyncColor;
+            get => _vSyncModeColor;
             set
             {
-                _vsyncColor = value;
+                _vSyncModeColor = value;
 
                 OnPropertyChanged();
             }
         }
 
+        public bool ShowCustomVSyncIntervalPicker
+        {
+            get
+            {
+                if (_isGameRunning)
+                {
+                    return AppHost.Device.VSyncMode ==
+                           VSyncMode.Custom;
+                }
+                else
+                {
+                    return false;
+                }
+            }
+            set
+            {
+                OnPropertyChanged();
+            }
+        }
+
+        public int CustomVSyncIntervalPercentageProxy
+        {
+            get => _customVSyncIntervalPercentageProxy;
+            set
+            {
+                int newInterval = (int)((value / 100f) * 60);
+                _customVSyncInterval = newInterval;
+                _customVSyncIntervalPercentageProxy = value;
+                if (_isGameRunning)
+                {
+                    AppHost.Device.CustomVSyncInterval = newInterval;
+                    AppHost.Device.UpdateVSyncInterval();
+                }
+                OnPropertyChanged((nameof(CustomVSyncInterval)));
+                OnPropertyChanged((nameof(CustomVSyncIntervalPercentageText)));
+            }
+        }
+
+        public string CustomVSyncIntervalPercentageText
+        {
+            get
+            {
+                string text = CustomVSyncIntervalPercentageProxy.ToString() + "%";
+                return text;
+            }
+            set
+            {
+
+            }
+        }
+
+        public int CustomVSyncInterval
+        {
+            get => _customVSyncInterval;
+            set
+            {
+                _customVSyncInterval = value;
+                int newPercent = (int)((value / 60f) * 100);
+                _customVSyncIntervalPercentageProxy = newPercent;
+                if (_isGameRunning)
+                {
+                    AppHost.Device.CustomVSyncInterval = value;
+                    AppHost.Device.UpdateVSyncInterval();
+                }
+                OnPropertyChanged(nameof(CustomVSyncIntervalPercentageProxy));
+                OnPropertyChanged(nameof(CustomVSyncIntervalPercentageText));
+                OnPropertyChanged();
+            }
+        }
+
         public byte[] SelectedIcon
         {
             get => _selectedIcon;
@@ -578,6 +652,17 @@ namespace Ryujinx.Ava.UI.ViewModels
             }
         }
 
+        public string VSyncModeText
+        {
+            get => _vSyncModeText;
+            set
+            {
+                _vSyncModeText = value;
+
+                OnPropertyChanged();
+            }
+        }
+
         public string DockedStatusText
         {
             get => _dockedStatusText;
@@ -1292,17 +1377,18 @@ namespace Ryujinx.Ava.UI.ViewModels
             {
                 Dispatcher.UIThread.InvokeAsync(() =>
                 {
-                    Application.Current!.Styles.TryGetResource(args.VSyncEnabled
-                        ? "VsyncEnabled"
-                        : "VsyncDisabled",
+                    Application.Current!.Styles.TryGetResource(args.VSyncMode,
                         Application.Current.ActualThemeVariant,
                         out object color);
 
                     if (color is Color clr)
                     {
-                        VsyncColor = new SolidColorBrush(clr);
+                        VSyncModeColor = new SolidColorBrush(clr);
                     }
 
+                    VSyncModeText = args.VSyncMode == "Custom" ? "Custom" : "VSync";
+                    ShowCustomVSyncIntervalPicker =
+                        args.VSyncMode == VSyncMode.Custom.ToString();
                     DockedStatusText = args.DockedMode;
                     AspectRatioStatusText = args.AspectRatio;
                     GameStatusText = args.GameStatus;
@@ -1495,6 +1581,27 @@ namespace Ryujinx.Ava.UI.ViewModels
             }
         }
 
+        public void ToggleVSyncMode()
+        {
+            AppHost.VSyncModeToggle();
+            OnPropertyChanged(nameof(ShowCustomVSyncIntervalPicker));
+        }
+
+        public void VSyncModeSettingChanged()
+        {
+            if (_isGameRunning)
+            {
+                AppHost.Device.CustomVSyncInterval = ConfigurationState.Instance.Graphics.CustomVSyncInterval.Value;
+                AppHost.Device.UpdateVSyncInterval();
+            }
+
+            CustomVSyncInterval = ConfigurationState.Instance.Graphics.CustomVSyncInterval.Value;
+            OnPropertyChanged(nameof(ShowCustomVSyncIntervalPicker));
+            OnPropertyChanged(nameof(CustomVSyncIntervalPercentageProxy));
+            OnPropertyChanged(nameof(CustomVSyncIntervalPercentageText));
+            OnPropertyChanged(nameof(CustomVSyncInterval));
+        }
+
         public async Task ExitCurrentState()
         {
             if (WindowState is WindowState.FullScreen)

src/Ryujinx/UI/ViewModels/SettingsViewModel.cs

@@ -52,6 +52,10 @@ namespace Ryujinx.Ava.UI.ViewModels
         private int _graphicsBackendIndex;
         private int _scalingFilter;
         private int _scalingFilterLevel;
+        private int _customVSyncInterval;
+        private bool _enableCustomVSyncInterval;
+        private int _customVSyncIntervalPercentageProxy;
+        private VSyncMode _vSyncMode;
 
         public event Action CloseWindow;
         public event Action SaveSettingsEvent;
@@ -154,7 +158,74 @@ namespace Ryujinx.Ava.UI.ViewModels
         public bool EnableDockedMode { get; set; }
         public bool EnableKeyboard { get; set; }
         public bool EnableMouse { get; set; }
-        public bool EnableVsync { get; set; }
+        public VSyncMode VSyncMode
+        {
+            get => _vSyncMode;
+            set
+            {
+                if (value == VSyncMode.Custom ||
+                    value == VSyncMode.Switch ||
+                    value == VSyncMode.Unbounded)
+                {
+                    _vSyncMode = value;
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public int CustomVSyncIntervalPercentageProxy
+        {
+            get => _customVSyncIntervalPercentageProxy;
+            set
+            {
+                int newInterval = (int)((value / 100f) * 60);
+                _customVSyncInterval = newInterval;
+                _customVSyncIntervalPercentageProxy = value;
+                OnPropertyChanged((nameof(CustomVSyncInterval)));
+                OnPropertyChanged((nameof(CustomVSyncIntervalPercentageText)));
+            }
+        }
+
+        public string CustomVSyncIntervalPercentageText
+        {
+            get
+            {
+                string text = CustomVSyncIntervalPercentageProxy.ToString() + "%";
+                return text;
+            }
+        }
+
+        public bool EnableCustomVSyncInterval
+        {
+            get => _enableCustomVSyncInterval;
+            set
+            {
+                _enableCustomVSyncInterval = value;
+                if (_vSyncMode == VSyncMode.Custom && !value)
+                {
+                    VSyncMode = VSyncMode.Switch;
+                }
+                else if (value)
+                {
+                    VSyncMode = VSyncMode.Custom;
+                }
+                OnPropertyChanged();
+            }
+        }
+
+        public int CustomVSyncInterval
+        {
+            get => _customVSyncInterval;
+            set
+            {
+                _customVSyncInterval = value;
+                int newPercent = (int)((value / 60f) * 100);
+                _customVSyncIntervalPercentageProxy = newPercent;
+                OnPropertyChanged(nameof(CustomVSyncIntervalPercentageProxy));
+                OnPropertyChanged(nameof(CustomVSyncIntervalPercentageText));
+                OnPropertyChanged();
+            }
+        }
         public bool EnablePptc { get; set; }
         public bool EnableLowPowerPptc { get; set; }
         public bool EnableInternetAccess { get; set; }
@@ -484,7 +555,9 @@ namespace Ryujinx.Ava.UI.ViewModels
             CurrentDate = currentDateTime.Date;
             CurrentTime = currentDateTime.TimeOfDay;
 
-            EnableVsync = config.Graphics.EnableVsync;
+            EnableCustomVSyncInterval = config.Graphics.EnableCustomVSyncInterval.Value;
+            CustomVSyncInterval = config.Graphics.CustomVSyncInterval;
+            VSyncMode = config.Graphics.VSyncMode;
             EnableFsIntegrityChecks = config.System.EnableFsIntegrityChecks;
             DramSize = config.System.DramSize;
             IgnoreMissingServices = config.System.IgnoreMissingServices;
@@ -590,7 +663,9 @@ namespace Ryujinx.Ava.UI.ViewModels
             }
 
             config.System.SystemTimeOffset.Value = Convert.ToInt64((CurrentDate.ToUnixTimeSeconds() + CurrentTime.TotalSeconds) - DateTimeOffset.Now.ToUnixTimeSeconds());
-            config.Graphics.EnableVsync.Value = EnableVsync;
+            config.Graphics.VSyncMode.Value = VSyncMode;
+            config.Graphics.EnableCustomVSyncInterval.Value = EnableCustomVSyncInterval;
+            config.Graphics.CustomVSyncInterval.Value = CustomVSyncInterval;
             config.System.EnableFsIntegrityChecks.Value = EnableFsIntegrityChecks;
             config.System.DramSize.Value = DramSize;
             config.System.IgnoreMissingServices.Value = IgnoreMissingServices;
@@ -660,6 +735,7 @@ namespace Ryujinx.Ava.UI.ViewModels
             config.ToFileFormat().SaveConfig(Program.ConfigurationPath);
 
             MainWindow.UpdateGraphicsConfig();
+            MainWindow.MainWindowViewModel.VSyncModeSettingChanged();
 
             SaveSettingsEvent?.Invoke();
 

src/Ryujinx/UI/Views/Main/MainStatusBarView.axaml

@@ -79,15 +79,59 @@
             MaxHeight="18"
             Orientation="Horizontal">
             <TextBlock
-                Name="VsyncStatus"
+                Name="VSyncMode"
                 Margin="5,0,5,0"
                 HorizontalAlignment="Left"
                 VerticalAlignment="Center"
-                Foreground="{Binding VsyncColor}"
+                Foreground="{Binding VSyncModeColor}"
                 IsVisible="{Binding !ShowLoadProgress}"
-                PointerReleased="VsyncStatus_PointerReleased"
-                Text="VSync"
-                TextAlignment="Start" />
+                PointerReleased="VSyncMode_PointerReleased"
+                Text="{Binding VSyncModeText}"
+                TextAlignment="Start"/>
+                <Button MinWidth="0"
+                        Width="20"
+                        IsVisible="{Binding ShowCustomVSyncIntervalPicker}"
+                        Margin="-5,0,5,0"
+                        Background="Transparent"
+                        BorderThickness="0">
+                    <ui:SymbolIcon Symbol="Settings"
+                                   HorizontalAlignment="Stretch"
+                                   VerticalAlignment="Center"
+                                   Width="14"
+                                   Height="14"/>
+                    <Button.Styles>
+                        <Style Selector=":checked">
+                            <Style Selector="^:checked ContentPresenter">
+                                <Setter Property="Foreground" Value="{DynamicResource ThemeForegroundColor}" />
+                            </Style>
+                        </Style>
+                        <Style Selector="Border#SeparatorBorder">
+                            <Setter Property="Opacity" Value="0" />
+                        </Style>
+                    </Button.Styles>
+                    <Button.Flyout>
+                        <Flyout Placement="Top" ShowMode="TransientWithDismissOnPointerMoveAway">
+                            <StackPanel Margin="0,0,0,0"
+                                        Orientation="Horizontal">
+                                <Slider Value="{Binding CustomVSyncIntervalPercentageProxy}"
+                                        MinWidth="175"
+                                        Margin="0,-3,0,0"
+                                        Height="32"
+                                        Padding="0,-5"
+                                        TickFrequency="1"
+                                        IsSnapToTickEnabled="True"
+                                        LargeChange="10"
+                                        SmallChange="1"
+                                        VerticalAlignment="Center"
+                                        Minimum="10"
+                                        Maximum="400" />
+                                <TextBlock Margin="5,0"
+                                           Width="40"
+                                           Text="{Binding CustomVSyncIntervalPercentageText}"/>
+                            </StackPanel>
+                        </Flyout>
+                    </Button.Flyout>
+                </Button>
             <Border
                 Width="2"
                 Height="12"

src/Ryujinx/UI/Views/Main/MainStatusBarView.axaml.cs

@@ -38,11 +38,10 @@ namespace Ryujinx.Ava.UI.Views.Main
             }
         }
 
-        private void VsyncStatus_PointerReleased(object sender, PointerReleasedEventArgs e)
+        private void VSyncMode_PointerReleased(object sender, PointerReleasedEventArgs e)
         {
-            Window.ViewModel.AppHost.ToggleVSync();
-
-            Logger.Info?.Print(LogClass.Application, $"VSync toggled to: {Window.ViewModel.AppHost.Device.EnableDeviceVsync}");
+            Window.ViewModel.ToggleVSyncMode();
+            Logger.Info?.Print(LogClass.Application, $"VSync Mode toggled to: {Window.ViewModel.AppHost.Device.VSyncMode}");
         }
 
         private void DockedStatus_PointerReleased(object sender, PointerReleasedEventArgs e)

src/Ryujinx/UI/Views/Settings/SettingsHotkeysView.axaml

@@ -1,4 +1,4 @@
-<UserControl
+<UserControl
     x:Class="Ryujinx.Ava.UI.Views.Settings.SettingsHotkeysView"
     xmlns="https://github.com/avaloniaui"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
@@ -50,9 +50,9 @@
                     Classes="h1"
                     Text="{ext:Locale SettingsTabHotkeysHotkeys}" />
                 <StackPanel>
-                    <TextBlock Text="{ext:Locale SettingsTabHotkeysToggleVsyncHotkey}" />
-                    <ToggleButton Name="ToggleVsync">
-                        <TextBlock Text="{Binding KeyboardHotkey.ToggleVsync, Converter={StaticResource Key}}" />
+                    <TextBlock Text="{ext:Locale SettingsTabHotkeysToggleVSyncModeHotkey}" />
+                    <ToggleButton Name="ToggleVSyncMode">
+                        <TextBlock Text="{Binding KeyboardHotkey.ToggleVSyncMode, Converter={StaticResource Key}}" />
                     </ToggleButton>
                 </StackPanel>
                 <StackPanel>
@@ -103,6 +103,18 @@
                         <TextBlock Text="{Binding KeyboardHotkey.VolumeDown, Converter={StaticResource Key}}" />
                     </ToggleButton>
                 </StackPanel>
+                <StackPanel Margin="10,0,0,0" Orientation="Horizontal">
+                    <TextBlock Text="{ext:Locale SettingsTabHotkeysIncrementCustomVSyncIntervalHotkey}" />
+                    <ToggleButton Name="CustomVSyncIntervalIncrement">
+                        <TextBlock Text="{Binding KeyboardHotkey.CustomVSyncIntervalIncrement, Converter={StaticResource Key}}" />
+                    </ToggleButton>
+                </StackPanel>
+                <StackPanel Margin="10,0,0,0" Orientation="Horizontal">
+                    <TextBlock Text="{ext:Locale SettingsTabHotkeysDecrementCustomVSyncIntervalHotkey}" />
+                    <ToggleButton Name="CustomVSyncIntervalDecrement">
+                        <TextBlock Text="{Binding KeyboardHotkey.CustomVSyncIntervalDecrement, Converter={StaticResource Key}}" />
+                    </ToggleButton>
+                </StackPanel>
             </StackPanel>
         </Border>
    </ScrollViewer>

src/Ryujinx/UI/Views/Settings/SettingsHotkeysView.axaml.cs

@@ -82,8 +82,8 @@ namespace Ryujinx.Ava.UI.Views.Settings
 
                                 switch (button.Name)
                                 {
-                                    case "ToggleVsync":
-                                        viewModel.KeyboardHotkey.ToggleVsync = buttonValue.AsHidType<Key>();
+                                    case "ToggleVSyncMode":
+                                        viewModel.KeyboardHotkey.ToggleVSyncMode = buttonValue.AsHidType<Key>();
                                         break;
                                     case "Screenshot":
                                         viewModel.KeyboardHotkey.Screenshot = buttonValue.AsHidType<Key>();
@@ -109,6 +109,12 @@ namespace Ryujinx.Ava.UI.Views.Settings
                                     case "VolumeDown":
                                         viewModel.KeyboardHotkey.VolumeDown = buttonValue.AsHidType<Key>();
                                         break;
+                                    case "CustomVSyncIntervalIncrement":
+                                        viewModel.KeyboardHotkey.CustomVSyncIntervalIncrement = buttonValue.AsHidType<Key>();
+                                        break;
+                                    case "CustomVSyncIntervalDecrement":
+                                        viewModel.KeyboardHotkey.CustomVSyncIntervalDecrement = buttonValue.AsHidType<Key>();
+                                        break;
                                 }
                             }
                         };

src/Ryujinx/UI/Views/Settings/SettingsSystemView.axaml

@@ -4,6 +4,7 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:ui="clr-namespace:FluentAvalonia.UI.Controls;assembly=FluentAvalonia"
     xmlns:ext="clr-namespace:Ryujinx.Ava.Common.Markup"
     xmlns:viewModels="clr-namespace:Ryujinx.Ava.UI.ViewModels"
     xmlns:helpers="clr-namespace:Ryujinx.Ava.UI.Helpers"
@@ -181,11 +182,68 @@
                             Width="350"
                             ToolTip.Tip="{ext:Locale TimeTooltip}" />
                     </StackPanel>
-                    <CheckBox IsChecked="{Binding EnableVsync}">
+                    <StackPanel Margin="0,0,0,10"
+                                Orientation="Horizontal">
                         <TextBlock
-                            Text="{ext:Locale SettingsTabSystemEnableVsync}"
-                            ToolTip.Tip="{ext:Locale VSyncToggleTooltip}" />
-                    </CheckBox>
+                            VerticalAlignment="Center"
+                            Text="{ext:Locale SettingsTabSystemVSyncMode}"
+                            ToolTip.Tip="{ext:Locale SettingsTabSystemVSyncModeTooltip}"
+                            Width="250" />
+                        <ComboBox
+                            IsVisible="{Binding EnableCustomVSyncInterval}"
+                            SelectedIndex="{Binding VSyncMode}"
+                            ToolTip.Tip="{ext:Locale SettingsTabSystemVSyncModeTooltipCustom}"
+                            HorizontalContentAlignment="Left"
+                            Width="350">
+                            <ComboBoxItem>
+                                <TextBlock Text="{ext:Locale SettingsTabSystemVSyncModeSwitch}" />
+                            </ComboBoxItem>
+                            <ComboBoxItem>
+                                <TextBlock Text="{ext:Locale SettingsTabSystemVSyncModeUnbounded}" />
+                            </ComboBoxItem>
+                            <ComboBoxItem>
+                                <TextBlock Text="{ext:Locale SettingsTabSystemVSyncModeCustom}" />
+                            </ComboBoxItem>
+                        </ComboBox>
+                        <ComboBox
+                            IsVisible="{Binding !EnableCustomVSyncInterval}"
+                            SelectedIndex="{Binding VSyncMode}"
+                            ToolTip.Tip="{ext:Locale SettingsTabSystemVSyncModeTooltip}"
+                            HorizontalContentAlignment="Left"
+                            Width="350">
+                            <ComboBoxItem>
+                                <TextBlock Text="{ext:Locale SettingsTabSystemVSyncModeSwitch}" />
+                            </ComboBoxItem>
+                            <ComboBoxItem>
+                                <TextBlock Text="{ext:Locale SettingsTabSystemVSyncModeUnbounded}" />
+                            </ComboBoxItem>
+                        </ComboBox>
+                    </StackPanel>
+                    <StackPanel IsVisible="{Binding EnableCustomVSyncInterval}"
+                                Margin="0,0,0,10"
+                                Orientation="Horizontal">
+                        <TextBlock
+                            VerticalAlignment="Center"
+                            Text="{ext:Locale SettingsTabSystemCustomVSyncIntervalPercentage}"
+                            ToolTip.Tip="{ext:Locale SettingsTabSystemCustomVSyncIntervalValueTooltip}"
+                            Width="250" />
+                        <Slider Value="{Binding CustomVSyncIntervalPercentageProxy}"
+                                ToolTip.Tip="{ext:Locale SettingsTabSystemCustomVSyncIntervalSliderTooltip}"
+                                MinWidth="175"
+                                Margin="10,-3,0,0"
+                                Height="32"
+                                Padding="0,-5"
+                                TickFrequency="1"
+                                IsSnapToTickEnabled="True"
+                                LargeChange="10"
+                                SmallChange="1"
+                                VerticalAlignment="Center"
+                                Minimum="10"
+                                Maximum="400" />
+                        <TextBlock Margin="5,0"
+                                   Width="40"
+                                   Text="{Binding CustomVSyncIntervalPercentageText}"/>
+                    </StackPanel>
                     <CheckBox IsChecked="{Binding EnableFsIntegrityChecks}">
                         <TextBlock
                             Text="{ext:Locale SettingsTabSystemEnableFsIntegrityChecks}"
@@ -244,6 +302,11 @@
                         ToolTip.Tip="{ext:Locale IgnoreAppletTooltip}">
                         <TextBlock Text="{ext:Locale SettingsTabSystemIgnoreApplet}" />
                     </CheckBox>
+                    <CheckBox
+                        IsChecked="{Binding EnableCustomVSyncInterval}"
+                        ToolTip.Tip="{ext:Locale SettingsTabSystemEnableCustomVSyncIntervalTooltip}">
+                        <TextBlock Text="{ext:Locale SettingsTabSystemEnableCustomVSyncInterval}" />
+                    </CheckBox>
                 </StackPanel>
             </StackPanel>
         </Border>

src/Ryujinx/UI/Windows/MainWindow.axaml.cs

@@ -38,6 +38,8 @@ namespace Ryujinx.Ava.UI.Windows
 {
     public partial class MainWindow : StyleableAppWindow
     {
+        internal static MainWindowViewModel MainWindowViewModel { get; private set; }
+        
         public MainWindowViewModel ViewModel { get; }
 
         internal readonly AvaHostUIHandler UiHandler;
@@ -73,7 +75,7 @@ namespace Ryujinx.Ava.UI.Windows
 
         public MainWindow()
         {
-            DataContext = ViewModel = new MainWindowViewModel
+            DataContext = ViewModel = MainWindowViewModel = new MainWindowViewModel
             {
                 Window = this
             };