Question PC shutting off while gaming (GPU)

[blissnoise]

My PC is automatically shutting off and restarting while gaming. I’ve done CPU and GPU stress tests and it appears to only crash while running the GPU tests. Temperatures seem normal for both the CPU and GPU. PC is always well maintained no chance of dust being a factor. Running stock settings in bios, no overclocks.

Time of ownership: ~3-4 years
Specs:
PSU:EVGA SUPERNOVA 850 G3 80 Gold plus
Motherboard: ASUS Maximus VIII Hero
CPU: i7 6700k @
GPU: ASUS GeForce GTX 1060 Turbo
CPU Water cooling/Case: Captain Genome Cooling system

Any help would be much appreciated. I’m not really sure to go from here and I don’t want to spend the $100 just to get it diagnosed.

 

[rgd1101]

make and model of the psu?

 

[blissnoise]

EVGA SuperNOVA 850 G3 Here

 

[blissnoise]

So I got a friend to let me barrow his GPU and it still restarts...CPU benchmarks seem fine. When I run GPU benchmarks it still shuts off. It appears to be a heat issue. When my room is cold it doesn’t happen as frequent if not at all. GPU temps are normal. My CPU stays under 80c under full load. I’m really confused to what it could be. Is it possible faulty house wiring could damage a PSU? When I turn my big fan on when it’s plugged into the same circuit my PC screen would flash. I’m at a loss to what it could be.