I played Shadow of Mordor on optimal settings, the temperatures were good.
After I was done playing, the temperatures got back to normal in seconds of course, yet 5 minutes later my computer just unexpectedly shutted down.
It happened twice today with Shadow of Mordor, and it happened occasionally in the past as-well.
When this happens my computer automatically restarts, but it usually shuts-down unexpectedly again right away. (I try to shut it down before and give it a minute before the restart, just in case it does have to do with temperature, and that got it started up successfully so far even though I don't think temperatures are the issue).
How can I troubleshoot and fix my problem?
I don't know much about hardware, but I have a hunch that this is a PSU issue. Is that likely?
It seems somewhat strange that it only happens after gaming. I can play for hours, but only afterwards it will find a reason to shut-down.
I'm running AMD Radeon R9 290X, with Intel Core i7-4790K, drivers are up to date.
The system logged a critical message saying from the kernel-power saying "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly."