Some players report a slight "floaty" mouse feel in competitive games like CS2 or Valorant.
Should you keep "Fullscreen Optimizations" on or off in Windows? Here is the quick breakdown for gamers and power users. The Short Answer for most modern games (DirectX 11 and 12). fullscreen optimizations on or off
For the average player, this is negligible. However, for high-level competitive play (think Counter-Strike 2 , Valorant , or Overwatch at 300+ FPS), every millisecond counts. Players turn FSO to force the game back into "Exclusive Fullscreen" mode. Some players report a slight "floaty" mouse feel
while technically running in a borderless window. The Short Answer for most modern games (DirectX 11 and 12)
Older DirectX 9 games often struggle with it, leading to lower FPS or screen tearing.
Here is an analysis of when you should use it, when you should disable it, and how it impacts your hardware performance.
To understand the debate, we first have to understand what Windows is trying to do.