Stablilty issue with custom built PC. Sabertooth 990fx r2.0

Dav1d

Honorable
Nov 12, 2013
2
0
10,510
I am having a stability issue with my custom built PC. I've had it for about 3 months now. It works great for normal everyday stuff like web browsing listening to music doing homework etc. Whenever I play a game that pulls a lot of resource the computer restarts. I have conducted a battery of stress tests and I have completely ruled out overheating. Whenever I stress the CPU GPU and RAM to 100% individually the computer is fine. When I run CPU+RAM at 100% its fine, when I run RAM+GPU its fine, but when I run the CPU and GPU at 100% the system crashes. I also updated my BIOS and all my drivers for my motherboard and GPU.

My Build is
ASUS sabertooth 990fx r2.0 (mother board)
AMD 8350 FX processor black edition (CPU)
AMD Radeon HD7770 (GPU)
2x8 GB patriot memory (RAM)
Corsair HX850w (PSU)
1TB western digital black label hard drive

I've also tried other ram cards and the problem persists

Any help or suggestions would be much appreciated!