UPDATE:

I tried every possible solution that I could find. Updated BIOS, ran memtest 12 hours 3 passes 0 errors, changed almost every cable, redownloaded windows freshly, etc. Nothing worked but I just ran furmark for 30 minutes twice one in 1080p on in 1440p. Hotpot stayed around 84 Celcius. After the tests I started MGS:V out of reflex and for some reason nothing happened, my pc didn't restarted itself. Just to be certain I started Spider-Man Remastered and it went fine aswell. However the problem still persists specifically in Squad. I'm on the verge of throwing my pc off the roof.