Updated 1/26/26

So, how many Frames Per Second can the human eye see?

You may wonder what happens if you’re watching something with a really high FPS rate. Are you actually seeing all those frames that flash by? After all, your eye doesn’t move as fast as 30 motions per second.

The short answer is that you may not be able to consciously register those frames, but your eyes and brain may be aware of them.

For example, take the 60-frames-per-second rate that many have accepted as the uppermost limit.

Some research suggests that your brain might actually be able to identify images that you see for a much shorter period of time than experts thought.

For example, the authors of a 2014 study out of the Massachusetts Institute of Technology found that the brain can process an image that your eye sees for only 13 milliseconds — a very rapid processing speed.

That’s especially rapid when compared with the accepted 100 milliseconds that appears in earlier studies. Thirteen milliseconds translate into about 75 frames per second.

Source: HealthLine

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V-Sync, G-Sync and FreeSync

Adaptive-Sync was introduced by Nvidia as G-Sync. AMD also added FreeSync to provide Adaptive-Sync for their cards.

Enabling V-Sync could eliminate tearing, but causes increased lag and stutter.

The “Vertical Sync” (V-Sync) setting in Nvidia Control Panel set to “Fast” renders unconstrained almost as fast as V-Sync disabled, except doesn’t tear since frames rate above your monitor refresh rate will just drop the extra frames.

G-Sync can eliminate screen tearing and minimize the display stutter and input lag.

Leaving G-Sync on won’t cause any harm, running games beyond the maximum refresh rate of your monitor will disable G-Sync, meaning that if you’re playing an easier to run game there is likely no benefit to using it.

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Nvidia GeForce Settings

The suggested settings below are geared more towards performance, while retaining good quality 3D image and avoid stutters.

While these settings can enhance frame rate, any frame count exceeding your monitor’s refresh rate will be discarded. In other words, your GPU is running hotter just to discard frame you don’t see.

Reminder: your brain can only identify images at 75fps.

Low Latency Mode

Ultra Low Latency Mode (NULL) reduces input lag in games, particularly in DirectX 9/11 titles, by minimizing the frame buffer. This results in a more responsive gameplay experience, similar to a system that submits frames as soon as the GPU is ready instead of waiting. You can enable it in the NVIDIA Control Panel under “Manage 3D Settings.” However, it may lower FPS or cause stutter if your CPU can’t keep up, even though it generally enhances 1% lows for smoother performance.

“On” is usually the best choice for most games since it limits the render queue to one frame, balancing performance and latency; “Ultra” should only be used in GPU-heavy situations (95-100% usage) where your system has trouble keeping up, as it aims for zero frames and may cause stuttering if the GPU lags, while “Off” is often better for CPU-heavy games or when your GPU has plenty of power, with Reflex settings taking priority if available.

V-Sync

The main downside to using VSYNC is that it can reduce your computer’s performance. Additionally, some people may notice input lag or stuttering when using it. However, these issues are usually only noticeable in certain situations and may not affect everyone.

Another option to using “Use the 3D application setting” could be FAST-SYNC – De-coupled rendering and monitor refresh. VSYNC OFF the monitor will only render completely rendered frames, thus eliminating tearing (minor input lag but no tearing ) also it is monitor agnostic so it will work with any screen. It is analogous to hardware triple buffering but does not back-pressure the render pipeline.

V-Sync settings in Nvidia Control Panel will over-ride V-sync setting in Aces High

Note: Avoid global overrides that affect all applications.

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The settings below may depend on your GPU model and driver.

Manage 3D Settings Menu	Performance settings
Image scaling	On (GPU Scaling & Sharpening) boosts frame rates for the application.
Antialiasing – Mode	Application-controlled can minimize jagged edges, often called “jaggies” or “the staircase effect,” in some situations.
Antialiasing Transparency	Multisampling provides superior performance.
Max Frame Rate	your brain can only identify images at 75fps.
Power Management mode	Prefer maximum performance (graphics card’s performance level)
Shader Cache Size	Unlimited (maximum disk space for storing shader compile) Setting a size limit too small may cause the driver to remove shaders you still make use of and cause game play stutters
Low Latency Mode	Off (default) prioritizes render throughput by allowing games to queue frames. Good for CPU-heavy games or when your GPU has plenty of power
Texture Filtering Negative LOD bias	Allow (lets applications specify a negative LOD bias when anisotropic filtering is used.)
Texture filtering – Quality	Performance (offers an optimal blend of image quality and performance.)
Texture filtering – Trilinear optimization	On (improves texture filtering performance by allowing bilinear filtering on textures in parts of the scene where trilinear filtering is not necessary.)
Threaded optimization	Off (for older games)
Vertical sync	Use the application setting (to use the settings within the application to control V-Sync), Fast (improves latency without introducing tearing) boost both boost fps Off (useful if performance is more important than image quality).
Max Frame Rate	Should be no higher than your monitor refresh rate. (to check yours go to: Start > Settings  > System  > Display  > Advanced display settings.)

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Flushing DirectX Shader Cache On Windows 11, DirectX Shader is an optimization feature for storing pre-compiled versions of special instructions, known as shaders. Shaders are small programs understood by the graphics card that control various graphical effects. Compiling shaders can be time-consuming, and using a cache helps optimize performance by providing easier and faster access to pre-compiled versions. The decision to clear the cache will depend on you. However, below are some reasons why you may want to do so. To resolve performance issues – A cleared DirectX Shader cache may resolve some performance issues, including graphical glitches and stuttering. Freeing up disk space – Even though the cache may not take up much space, clearing it will still free up some extra space on your computer. To update the cache – If you have just updated your graphics card or installed new games, you may clear the DirectX Shader cache to fill it with new information. Note: clearing the cache is not something you must do often. It is mainly a troubleshooting step when you face some graphical issues. This procedure will not negatively affect your system. This is because the cache is isolated storage with no permanent information. You cannot disable or prevent the creation of the DirectX Shader Cache. Windows 11 has no official way of disabling this optimization feature. Ccleaner provides an option to flush the DirectX Shader Cache. To flush DirectX Shader Cache Using Disk Cleanup 1. Open Start Menu, type cleanup in the search bar, click Disk Cleanup to open it.. 2. Select your C drive, then click the OK button. 3. Tick the DirectX Shader cache option and click OK. Note: Though this is meant to flush DSC, it could be a good idea to check every listed item.

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