If you can't change Monitor Refresh Rate in Windows 11/10, update the graphics drivers and disable V-Sync. Other than that, you can follow these fixes.

To change the refresh rate on your monitor on Windows, go to Settings > System > Display > Advanced display settings, click the drop-down menu under Refresh Rate, and click the preferred option.

Boost your gaming PC's FPS by changing your refresh rate! Learn to access display settings and choose your monitor's max ...