Built a new pc and power randomly cuts out when playing cs:go

[treehealage]

I finished putting together my new pc today and tried to play some counter strike global offensive and it just randomly cuts power, I'm using a trial version of windows 7 until I get a code for a full version. Also using a 5 year old harddrive.I was wondering if anyone knew what would be causing the random cut of power. Just tested with arma 3, it lasts about the same time in game then the power shuts off, it lasts for about 30 seconds.

edit: I have a year old corsair tx650w, should i try to run the pc with that?

PC Specs:
Mobo: Asus m5a99fx pro r2.0
CPU: Fx-8350
GPU: EVGA GTX 770 SC edition
Ram: 2x4gig G-skill ripjaw
PSU: Thermaltake smart 850w
HDD: some old hitachi 500gig not sure of the model

 

[darksoul1]

check where your CPU fan is plugged in sometimes people plug it into CHA_FAN instead of CPU_FAN

 

[treehealage]

check where your CPU fan is plugged in sometimes people plug it into CHA_FAN instead of CPU_FAN

just checked, the cpu fan is plugged into cpu_fan