Hey folks, I've got a bit of an issue that I really need some help with.
So my pc is about five years old right now. It always worked great, until last Friday when it suddenly, instantly, shut itself down. It didn't restart, it didn't show a blue screen, it just went black, as if the power went out. I didn't think much of it at first, after all, the power really could've gone out for a second. So I started it again and launched GTA V, which was the game I was playing when it happened. Then, after about 20 min, it happened again. This was when I realized that I had something bad going on. So I tried again, launched another game (Fallout 4) and, after about 15 min, it happened again. I blamed my power supply, as it just seemed as if the thing stopped working for a second or so, maybe due to overheating or something like that. So I replaced it with another power supply I had lying around today. At first, things went fine. I was playing GTA V for about 2 hours, and then it happened again. This made me conclude that it is, as a matter of fact, not my power supply. But I have no idea what else it could be, or how to diagnose the problem. I've been monitoring the temperatures on my PC using CPUID, and everything seems normal.
I really hope somebody knows something, I really have no idea where to start. Thanks in advance!
System specs:
OS: Windows 10 Pro 64-bit
Motherboard: MSI 970A-G46
PSU: XFX Pro 650Watt
CPU: AMD FX 8150 Black Edition
CPU Cooler: Cryorig M9A
GPU: MSI GeForce 660 TI
Memory: Corsair Vengeance DDR3-18866 8GB
Storage: WD Caviar Black 1TB
Samsung 850 EVO 250GB SSD
All fans seem to be working fine. I changed my CPU's thermal paste about 6 months ago, so that can't be the issue either.