Computer turns off without warning in-game

Eisenbd

Prominent
Apr 30, 2017
4
0
510
Hello all!

As the title says my computer simply turns off (and on again after a few seconds) without warning while in-game. It does not shut down, it's as if there is a power outage.

my system:
CPU: Intel Core i5-4690k
CPU Cooler: Cooler Master Hyper 212 Evo
RAM: Kingston HyperX FURY 8GB (2x4GB) 1866MHz DDR3
MoBo: Gigabyte G1 Sniper Z6
GPU: Asus Geforce GTX 960 2GB
HDD: WB Caviar Blue 1TB
Case: Corsair Carbide Series 200R
PSU: XFX XTR 550W GOLD
OS: Win 8.1 x64 pro

Troubleshooting I have done so far:
-Checked for overheating CPU/GPU (CPU ~35C, GPU~60C while in-game)
-Stress test using Intel Extreme Tuning Utility (similar temperatures as above, no problems reported)
-Checked all fans, got rid of any dust, etc
-Reinstalled windows
-Updated all drivers

Since I am sure it is not an issue with overheating, I was looking at the PSU. The problem is I am not sure how to check whether my PSU is working properly or not. The fan is working and the PSU is not hot.

Importantly, when I took out the GPU and ran some games using the in-built Intel HD Graphics 4600, the problem was gone. Graphics were pretty bad but the computer did not shut down. So my question is: Can I conclude from that that my GPU is somehow broken? Or could it still be a PSU related issue, as I assume without GPU there is much less stress on the PSU.

Any help would be greatly appreciated!
 

Eisenbd

Prominent
Apr 30, 2017
4
0
510
Thank you for your quick reply!

I also suspected the PSU at first and was about to buy a new one. But, as I said, if I take out the GPU and just use Intel graphics the problem is solved. So, do you still think this is likely to be a problem related to the PSU?
 
When under load the gpu will take more than 50% of the total power the pc needs. So taking the gpu out significantly reduces the wattage the PSU needs to provide. I'd actually say this symptom also point to psu.

Now I cannot be 100% sure but I would suspect the PSU over everything else.
 

Carnaxus

Reputable
Apr 18, 2017
1,431
3
5,665
See if a friend will let you test your PSU in their computer or maybe their PSU in your computer. That way you can test to see if it is actually the PSU without having to shell out for a new one only to find that it wasn't the issue after all.
 

Eisenbd

Prominent
Apr 30, 2017
4
0
510
Thanks for the suggestion @Carnaxus, but unfortunately I don't know anybody with (a strong enough) PSU.

Anyway, I bought a new one (Seasonic 620 M12 II Bronze) and the problem is solved. It was the PSU's fault indeed.

Thanks again for the support guys! :)