Here is my story:
Around new year's time i noticed, my pc reboots 1-2 times a day randomly. Was rock solid before.
I blamed windows and its updates as usual.
Did every suggested fix / settings i found online, nothing worked. (stress test ok, temps ok)
(after turning off auto restart to look for a blue screen, turns out pc just hanging / freezing, no dump, no event log, not a trace of any error)
Reinstalled windows, still freezing
Installed Linux from scratch, still freezing
Removed every OS, and was just hanging around the bios, optimizing stuff, and i still got multiple freezes just being there.
Then i remembered i updated bios around the time this started. I rolled it back to 0809 and no freeze yet (24h, need more days to fully test)
Just wanted to write this down, maybe someone benefits from it.
Thanks.
edit: 7700 cpu