My computer's been fine and dandy until today. I've gotten two random BSoDs and two sudden hard rebots in the span of just a few hours and I have no idea what it could be.
This is an old computer with new parts. Just recently kitted it out with a GTX 770 and overclocked by I5-750 to 3.8 GHz. On the second hard reboot I tried lowering the clock to ~3.6 but got the third crash not long after that. I've gotten the crashes doing completely pedestrian random stuff like browsing the web (1 BSoD, 1 crash+reboot), installing a program (BSoD), and running Skyrim for about 3 minutes (crash+reboot).
I think it may be the PSU. I have
this Silverstone 500W Power Supply, which I know is below the wattage of the recommended nVidia specs for a GTX 770, but I was assured by PC-GAF that it was totally fine. And for a while it was, since I've done a ton of gaming since I got it and I've never had an issue. It literally just started today.
Is there a general way of checking if the problem is my PSU? I don't want to shell out money for a new one and still have to suffer through the crashes. It's rendering my computer unusable.
EDIT: Another blue screen
This time it was watching a Youtube video.
Another two things I need to mention: after the third crash but before the fourth (the Skyrim hard reboot), I tested the CPU using Prime95 for about 3 hours, and absolutely nothing went wrong. I know you need to run Prime95 for way longer than that, but again, the computer BSoDs just by running a Youtube video. It's confusing.