I have this pc autorestart problem when playing games (any games), it just happens without any warning. Is so annoying and really down your mood playing games. I have NO overclock for my system, all at stock settings.
Here is what I did to find the culprit that cause the problem:
1. I thought my pc is overheated so I unmounted all the fans inside my casing, cpu fan, gpu fan and cleaned up the dust. Than I use Coretemp and Hwmonitor to check my cpu and gpu temperature. At full load, both temperature is at 70-80 degree celsius and this is unlikely to cause pc autorestart. After that I use stress...