Once per day freeze, black screen, and unexpected restart.

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TL;DR often my computer restarts unexpectedly (not exactly a BSOD, also never more than once in a day), with the screen freezing momentarily, followed by a very short lived return of the audio, and then a restart. Any advice or insight would be deeply appreciated, even more so if you’d be willing to read below.
I’ve been having a problem with my PC that’s arisen over the past few months which is starting to drive me a bit nuts. I built it just over a year ago, but just recently I’ve been experiencing this new problem:
Usually once a day (but never more than once), my computer will freeze completely for about half a second, sound will resume for another second or two, and then my computer will just flat out restart. Sometimes the fans (presumably just on the GPU) ramp up for around six seconds, too.
I’m not super knowledgeable, but I’ve been trying my earnest to figure out what’s wrong, and have gathered some very frustrating information on the way.

  1. I can never…

Once per day freeze, black screen, and unexpected restart.

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