Need PC Help.

[iFaBuLuS]

So I just got my new CyberPower, I'll leave a screenshot of the specs and what not. But long story short, I was playing H1Z1 on this for about 3-4 hours and the PC randomly restarted itself instantly. I really don't believe it was overheating but I could be wrong. Everytime I touch the case and feel it it's always really cool. And on top of that my other CyberPower, an AMD FX-4300 never had this problem. I was thinking it could have been the outlet I plugged it into because I don't believe I plugged my other PC into that one. So I switched plugs today. Any ideas? And also, would putting an external fan outside of my PC, like near it to blow some air on it on the low setting help as well just to be safe? Or nah.
PC Specs : http://prntscr.com/aq6ciy

 

[jbaker22]

What power supply is inside? Also, by restart do you mean that it gives a black screen, then starts up?

 

[iFaBuLuS]

Pretty much, it restarts instantly. I don't believe I plugged my other PC into the one I did for this one, so I swapped it to a different plug and it's been fine all day today. So maybe it was just a bad outlet I had it in? Not sure. My PSU is a 600 watt. Lol not sure of brand off the top of my head would have to check.