I'm having a weird issue with my PC where it completely powers off without warning, specifically when I'm loading high graphics games or other applications that require a lot from the disk. The setup includes a Corsair 4000D case, Asus Tuf Gaming B650 Plus Wi-Fi motherboard, Ryzen 7 9800X3D CPU, Asus Tuf Gaming Nvidia 5070 graphics card, 48GB of Corsair Dominator Titanium RAM, a Samsung 990 Evo Plus SSD, and a Corsair RM1000x power supply. My system runs Windows 11.
The shutdown happens during scene transitions or level loads, and it's not just a sleep or BSOD; it's a total power-off situation. After powering off, I can't restart the computer immediately; it only turns on briefly before shutting down again until I wait a bit or unplug/replug.
Interestingly, this hasn't happened during regular use, and I've ruled out a few things: my power supply is well above my components' needs, the CPU isn't overheating, and high CPU usage without heavy disk access seems fine. I've also ensured that other devices on the same outlet are unaffected.
Some things I'm unsure about include whether my NVMe disk was damaged during installation, since it was my first time mounting one, and that my RAM isn't on the motherboard's recommended list. Any advice would be appreciated!
2 Answers
Your issue could be related to a short circuit, especially since the power-off occurs right during heavy disk usage. Have you checked your disk for any visible damage? It might also be worth trying a different power supply if you have one on hand. Sometimes a PSU can have protective features that trip and shut everything down unexpectedly. Additionally, looking into your BIOS settings might help, especially regarding the RAM speeds, to see if anything is set too high.
Consider checking if the PSU is tripping a protection mode. If you're using a non-QVL RAM kit, that might also cause instability. It could trigger power issues; and if it doesn't happen when you're not heavily taxing the disk, it might be worth testing the NVMe in another slot if possible. Also, any LED indicators on your motherboard might give you a hint about what state it's getting stuck in when it fails to reboot.
I've looked for LED indicators but didn’t see much. I’ll try testing the RAM speeds and see if that has any effect.

I had a similar issue when my RAM was overclocked too aggressively. Try reverting to stock speeds for the RAM and see how the system behaves. It might stabilize things.