I’ve had very similar issues , my PC was bought brand new as well less than a year ago. A 3500 dollar unit that should be able to run my game perfect in 2K resolution as I’m only using 1 32” curved gaming monitor and it has become VERY unstable after SU12 i FINALLY had it running good after a month of playing with settings because months ago the game caused my SSD to fail when my Pc was only 6 months old. They had to install a fresh copy of windows 11 and i had major issues just getting the game to install. Finally had it running smooth enough and fairly stable then SU12 dropped and my Pc feels like it’s about to burn up another SSD. It’s really frustrating when you spend thousands just to enjoy a GAME. Then you have nothing but problems.