I've been dealing with this frustrating issue for over a year now. My PC randomly restarts with no clear pattern. Sometimes it runs perfectly while gaming or browsing, and other times it shuts down before fully booting up, cycling through on and off until it decides to cooperate. I've benchmarked all components using OCCT, and while they pass tests, there are days when it shuts down after just a few seconds. I'm running an i7 12700k, an RTX 3080, and 32GB of DDR5 RAM, powered by a 1000W PSU on an Asus motherboard. I've reset everything to factory settings, ran MemTest86, and checked temperatures which are consistent and safe, not going over 70°C under load. I've tried different power outlets and unplugging the PSU, which sometimes helps temporarily. I'm considering replacing parts, starting with the PSU, RAM, and then CPU if necessary. Any help would be appreciated!
4 Answers
I noticed you mentioned restarts before it fully boots. Does this happen only after it shuts down unexpectedly, or does it do this after a cold start too? If it's only after a crash, I'd say the PSU is likely the big suspect. If they can’t find anything at the shop, a PSU replacement might be your next best step.
Quick thought: have you updated your BIOS since changing to this motherboard? That can sometimes resolve stability issues. I'm in the process of doing that now myself. Fingers crossed!
That sounds really annoying! Since you've already done some thorough testing, I’d recommend swapping out the PSU first. It tends to be a common culprit with these issues, especially if there are no signs of memory or CPU failure. If the problem persists, then look into the CPU as a backup option.
Taking it to a repair shop could be a smart move. They can bench test the components for you without needing to fix anything, which might save you money in the long run. Just ask them to check your hardware; it shouldn’t cost too much for a quick test. Might be worth the peace of mind!
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