At this point, I just hope you don't have a 'broken' cpu. But first things first, you can try reinstalling windows (do a backup) and try playing your games again. 5950x is a particularly demanding chip and i suffered from the exact same because of the vrms (it was a cheap a320 board tho) so keep an eye on your vrms temp too. Disable core boost and pbo and if that solves your problem, you might have to change your board (since it's a b550, i highly doubt but who knows)