I’ve been having a strange problem with my PC for quite some time now, and I’m finally getting sick enough of it to do something.

With shocking regularity, my computer will completely loss power once a day, typically in the afternoon/night after many hours of use. Sometimes this “random” loss of power will occur during a time of load (IE playing a game), and other times it occurs while completely idle, sometimes while I’m not even in the same room as the computer.

I haven’t done much troubleshooting because honestly I don’t know where to start for this, because I have no idea what this problem might be. I initially though my PSU might be faulty, but the incredible regularity of the problem leads me to believe that the PSU is unlikely to be the culprit.

The problem briefly went away for a few months, but has returned again within the last month, which also leads me to believe the PSU is not the culprit, because why the hell would it randomly stop giving me issues for a few months before going back to it’s usual routine of dying precisely once a day (Seriously, it has NEVER done it twice in one day, not a single time.)

I’m seriously at a loss here, so all recommendations are helpful.

I’m running an intel i7-9700k, NOT overclocked

A brand new RTX 4070 (This was purchased after the problem started, so I am 100% certain it is not the problem)

I have 4 sticks of ram, totaling 80 GB, 2 sticks of 8 GB and 2 sticks of 32 GB, each of which are pairs.

I have straight up no idea what my PSU is (Which I know is terrible given my current problem), but it’s sufficient to run my computer, given that it, you know, runs.

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I’m in the process of testing with MemTest86 now, I’ll edit this post once I have the results.