Windows 11 includes features such as Auto-HDR, DirectStorage, and Game Mode that are designed to improve gaming performance, and DirectX 12 support for better high-frame rate gaming and Auto HDR for improved high-dynamic range visuals.
Tests have shown that Windows 11 offers the same gaming performance as the latest build of Windows 10, with no decrease in frame rate.
Microsoft has improved Game Pass integration into Windows 11, including Auto-HDR for existing games, DirectStorage for faster storage speeds, and the future of DirectX. Additionally, Windows 11 includes a Game Mode that deprioritizes non-game processes to help users get the most out of their hardware, and the new Microsoft gaming ecosystem has been built into Windows 11.
Why Windows 11 Is Better for PC Gaming Than Windows 10 - How-To Geek
PC gaming should be better on Windows 11, too. The upgrade brings in DirectX 12 support for better high-frame rate gaming, and Auto HDR should simplify high-dynamic range improvements by running them without needing to futz with graphics card settings or tweak every time you want to switch between different monitors.
Windows 11 vs Windows 10: Here's what's new | Tom's Guide
Windows 11 may not be any faster at games than Windows 10, but neither is it any slower. Of course, we tested Windows 11 with VBS disabled —that was the default after a clean install on our test hardware.
Windows 11 vs Windows 10 GPUs Tested: Which Games Faster?