Hello, everyone, recently my computer picked off this disturbing new act where it decides to shut down on certain games. For example, PUBG, I could be normally playing and all of a sudden the monitor goes black and the computer restarts, sometimes I have to perform this strange process where I need to manually shut down the PC, press the F10 key repeatedly for eight seconds, then the down arrow three times, and the enter key twice, because the monitor is not displaying anything. I could play Rainbow Six Siege for hours without crashing, but when it comes to Napoleon: Total War, then it shuts down as well, which I found weird.
I looked on the internet and came upon an article that suggested it could be a broken PSU or an overheated CPU. My graphics card is just fine, its a GTX 970 Gigabyte G1, and I can play on great quality, but this is starting to give me dread, what could it be? This never happened to me before. Thank you if you took the time to read all that.
TL;;DR: Computer shuts down on certain games, is it broken PSU, overheated CPU, or something else?