Poor game performance compared to Windows 11

Poor game performance compared to Windows 11. I compared performance with Windows and Linux in the game cyperpunk 2077 on the i5 7600k processor. Performance was the same, the average FPS was 80 frames. When I updated to r5 7500f, 32 gb, then the performance in Windows was 100 frames, while in Linux it did not change, there were 80 frames. After changing the processor, I reinstalled Linux from scratch. My video card is nvidia 1660 super

That is because the 1660, which can not handle vulkan well.

sounds a bit strange, the video card seems to be still relevant

The performance will not increase, when youre in the GPU limit.

You can try General System Tweaks | CachyOS

Maybe you need to balance the settings.

But look, I can get 64fps on my GTX 1060 6GB, with HIGH preset (there are 2 settings that need to be on medium, otherwise it will fail), with FSR 3 and frame generation!

Proton Experimental on Steam (Native).