once again an update: buying a new motherboard did not fix the issue. it still persists. i simply can not understand why my system has such erratic behavior. it worked flawlessly for over a week, why is the issue suddenly coming back now? i switched pretty much everything besides the drives...
update:
it was a faulty motherboard.
replaced my asrock b450 pro4 with an msi b450m pro-vdh 2 days ago and everything works fine again. even though the enermax ets t50 ripped my 3600 out of the socket. twice.
started happening 2 days ago whilst playing csgo. monitors lost signal, peripherals disconnected but the chassis/cpu fans kept spinning at idle speed.
yesterday the system was running for ~8 hours, played 2 hours of doom eternal just fine. went into a game of csgo and after a few rounds it...