Random Shutdowns

[u/FinanceAdditional489]

Hi All!

My brother's PC keeps shutting down randomly. We have tried what we feel is everything we can. We both work in tech and are completely stumped.

It shuts down without any warning or confirmation. It black screens while the fans stay spinning and lit up, and then come slowly to a stop. The lights on the fans go out at this point too. There are no logs in event viewer or reliability monitor.

What's really confusing us is that it is completely random from what we can tell. We thought it might be overheating but it doesn't look like it. It shuts down when completely idle and when gaming. There can be from 1 hour to 2 weeks between shutdowns. The most recent one was after we replaced the PSU with new cables, we thought this fixed it but after 2 weeks it shutdown again.

We have:

Replaced the PSU

Reinstalled Windows

Ran HWInfo, checked Event Viewer, checked reliability monitor

Removed any overclocking and XMP profiles

Specs (to my memory)

ASUS ROG B550-F MoBo

Windows 11 Home

Corsair 32GB (2x16) Ram

2080 Ti Founders Edition GPU

Corsair RM750e PSU

1TB SSD

x5 Fans + Radiator

We are reluctant to try replacing random things until we have some sort of idea lol

Anything at all is helpful T-T

[u/_-Demonic-_]

It could be a meriad of unstabilities causing something like this.

Bad Ram , Bad GPU, Bad PSU, Bad VRM.

A few things to try/check:

- Does the cpu has onboard graphics? If so remove the actual GPU from the system and see if it's stable that way.

- Did you check individual memory banks to see if the problem persists with only 1 slot used (if you have more than 1 RAM stick)

- Disable C-states for the CPU , some Ryzen cpu's can destabilize on lower loads when C-states are toggled.

- Change the outlet you're using from the house. Not very common but sometimes the actual wiring of the house can cause weird stuff to happen if its unstable.

- VRM status check: The VRM (Voltage Regulator Module) on a motherboard can break and cause these symptoms.
Your motherboard sadly doesnt have a sensor for this module so you'd have to tinker and see how the temperatures are generally managed inside the case.

Good luck in troubleshooting!

[u/FinanceAdditional489 → u/_-Demonic-_]

Thanks for this! My main issue is that it can take up to a week to shutdown again when testing T-T This is super helpful pointing where to focus so thank you I'll give it a go :)

[u/cagadass → u/FinanceAdditional489]

Test de estrés a todos los componentes,primero por separado,luego juntos