My pc restarts after about 5 minutes of The Forest and other games that I have to run at lower graphics settings. I also played games that are older and not that demanding, like Mafia 2. It ran for a couple of hours then the pc suddenly restarted. With the forest I monitored the cpu temperature, the max was 50 °C, so i suppose it cannot be the cpu overheating. I think it's the psu, because it is always a kernel power problem when i check it at the event logs after a restart. Also while I play i checked the system temperature in the openhardware software, it was about 50 °C when it shut down, so perhaps the psu fan is not spinning properly? It definitely spins, but i don't think it can spin really fast to cool the system down. I also checked the speedfan software but when I set the sys fan to spin at 100% nothing happens, it spins as it always does, in the bios/uefi when i set the it to maximum speed and the sound doesn't change and it should get noisy because of fast spinning, right? I know that this psu is not silent. Is there a way to test the psu if it's faulty, or just that the fan is faulty?