I FOUND A FIXXX!!! GET RID OF Windows 10 KB4592438 THAT CRAP BOMBARDED MY i7 3770k 100% CPU usage no matter the game including RED DEAD2! Now, My 2060Super is getting fully utilized again with Psycho Raytracing! back then I was only getting 50% Gpu usage and 100% CPU USAGE ALL CORES!
https://steamcommunity.com/sharedfiles/filedetails/?id=2330786249
https://steamcommunity.com/sharedfiles/filedetails/?id=2330786086
I had that KB, and I uninstalled it. But unfortunately it not do the trick for me, still same problem. What version of Windows 10 and OS build do you have? Mine is version 2004, OS build 19041.508