CPU problem but im not sure

Sniper434

Honorable
Jan 5, 2014
82
0
10,630
i just built a new computer and i was just doing normal things i always do and all of a sudden my comp just restarts on me, not sure what it was but my cpu temps are good, the only thing that i had open was WoW and then i pulled up chrome then it happened not sure what happened. My cpu is intel i5 6600k not OCing at the moment so not that and temps are around 30 to 40c

any help would be appreciated