RTX 40 series problems here.
Have you turned off Nvidia Overlay?
So what happened is that my computer has a 12900KS, 32GB of DDR4 3200 CL32, Asus ROG Strix Z690, and the crowning glory of it: A custom EK blocked RTX 4090. Now War Thunder is one of my favorite games, but unfortunately when I installed it and played it for the first time, the models looked garbage with horrible screen artifacting. Strangely this only happens in War Thunder. I have literally tried everything, replaced motherboard, reinstalled War Thunder and Windows, BIOS update etc. For some reason it only happens on my RTX 4090, I have asked Nvidia and even sent the GPU to them but they sent it back saying there was no problems so I don’t know what to do any ideas?
Actually I have turned off Overlay HDR etc.