First of all, let me put the specifications of my computer:
I have a problem with my computer, and I'm posting a message in these forums with the hope someone can help me. When playing certain games like Teslagrad, Darksiders, Shadow of Mordor, Guild Wars 2, Heroes of the Storm, and others, my computer sometimes suddenly shuts down (as if I flipped the swtich) and reboots itself automatically. While with some games I solved this issue turning Vsync on, for others this didn't work.
I ran an Avast scan, a Malwarebytes scan, and an Advanced System Care scan in order to find out if it was the problem of a virus or similar. Everything was fine. I used slimdrivers and driver booster to update all the drivers I could, but I still had that issue. I updated the BIOS, and still happened. So I concluded that the problem had to origin from hardware, and not software (please correct me if I left something unchecked).
I tried monitoring the temps of my CPU and GPU. CPU was overheating a little bit, so I changed the thermal paste, but it improved only a little bit (max temp around 60º, which as far as I know is okay). GPU achieved a maximum of 70º, which is also okay as far as I know, but the problem persisted.
I conducted a CPU stress test using Prime95 during 8 hours, and didn't get any error, but as soon as I tried using FurMark to stress test the GPU, I found the effect of this stress test were the same as some of the games mentioned: My computer rebooted itself automatically.
FurMark itself tells you it may be a Power Supply Unit problem, and since my GPU isn't overheating, I'm guessing that's the source of the problem? It also tells you it could be a VRM problem, but I'm not sure what that is. Also, according to CPUID HWMonitor, I think the voltages are a bit off, the +12V stays around 8V, and I'm not sure that's okay. Attached to this message you should be able to find the monitoring data.
With this info, is it same to assume it's a Power Supply Unit problem and that by buying a new one it's most likely the problem will be gone unless another component is also faulty? Or am I leaving another possibility unchecked? Could I get some help with this?
Also, if that happens to be the problem, I plan to buy this new Power Supply Unit:
Could I get some opinions on it? I think I don't need 700W and i'm ok with 500, but better safe than sorry imho. Also, anyone has experience in buying refurbished power supply units? Is it too risky?
Thanks, and sorry for the long post.