Threadripper 1920x CPU x399 strix MOBO strix vega64 GPU 64Gb gskill 3600 c16 (2x 16gb neo, 4x 8gb) Corsair HX1200 PSU EKWB CPU cooled with 2x 280se rads, Pump/res D5
CPU vcore 1.225 undervolted CPU runs 4.0ghz all core ram runs stable @ 2800 16-18-18-18-36 1.35v T1
this PC was never overheated. CPU while running P95 is 65c max GPU while running R20 or R23 is 70-75c max
Problem happens while gaming only. its like someone hit the reset power button. PC reboots and back to windows. i reinstalled windows over a dozen times now and still does it. been trying to figure this out now for weeks. did memtest passed 2x, tried 1 ram stick at a time with all 6 sticks no issues. tried different GPUs same problem. checked my PSU with a PSU checker no issues. all voltages are perfect. originally thought my google account was corrupted and was messing with my PC but it was not. same problem still happens.
I even setup a basic windows 10 x64 Pro with no extras. did not sign into google account. only drivers and basic programs needed to run PC. (afterburner, AI suite 3, CCC 21.12.1 ) worked for a few hours and back to resetting while gaming.
Im pretty good with PCs been working and fixing them for 25yrs now so I usually dont get stumped but I am now. any help would be greatly appreciated. this exact setup ran for over a year with no problems till Dec 2021