NVIDIA Gaming Performance Minimally Impacted By KPTI Patches
Whether at 1080p or 4K, Counter-Strike: Global Offensive that is very CPU dependent these days barely budged a frame when the Kernel Page Table Isolation was enabled in the kernel build.
With the more demanding Deus Ex: Mankind Divided Linux game port, the GTX 1060 lost by just one frame on average after the 3+ runs while the GTX 1080 Ti saw no change in performance.
Dota 2 with OpenGL and Vulkan saw no change in performance besides a possible frame or two difference, nothing that gamers would notice on their own.