Cant run any game!![(HELP)]

[drewmanbright09]

I cant run fortnite, argos, or anything not even the trashy game roblox. I can play for about 15 minutes than my pc will restart, sometimes I will get the bsod with some random error as the error changes every damn time. I just bought this pc off of letgo about a week ago. The guy said it was only a year old. I was able too play games for about a week than yesterday all this started happening. My anger is getting the best of me so if any could help me it would be greatly appreciated.
AMD FX (tm)-6300 Six Core Processor 3.50 GHZ 3.9 when OC (Its not oc currently)
DDR3 x2 4GB Ram sticks. (8gb total) (5.97 GB usable)
x64 bit windows
1tb hard drive
MSI 970A-G46 (nvidia sli) (amd cross fire x) -Motherboard
600 watt power supply.
I have 4 different fans on the case. High Mode 60 Degress F.
Low Mode fan speeds 69 Degrees F in low mode when just using my pc for non

 

[rgd1101]

Start by giving us the full system spec, include make and model of the psu

check cpu/gpu temp/usage during the game.

 

[drewmanbright09]

How about now?