PC Randomly shuts down, then immediately restarts on its own, with zero issues following restart.

My PC has a problem where it will randomly shut down then restart automatically, and I cant figure out what the issue is. It happens so infrequently that I cant test any fixes and I cant replicate it or force it to occur. Its mostly annoying because it interrupts anything im working on at the time.

I ran memory tests, everything was fine. I reinstalled GPU drivers multiple times. I installed a CPU temperature gauge which didnt show any overheating. I checked windows event logs, which doesn't show anything besides the PC restarting after an improper shutdown. I did just about anything short of replacing parts, since I dont know where the issue is, I dont want to randomly replace parts.

If anyone has had this happen please let me know how to fix it, or at least which part is most likely to need to be replaced.

Edit: from what I can tell it seems to be if I run video on both monitors at once, almost always happens if I have a video/stream on one and a game on the other, very rarely happens with nothing running, but still no fix.

Edit 2: Got a new GPU, problem seems to be gone. Issue was the power draw I believe, instead of running two separate power cables to the GPU, I only had one cable splitting into the two ports on the GPU. I set up another cable for the new GPU and it seems to be working fine.