Random power off issue

psykix

psykix

psykix

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Joined
17 Jan 2007
Posts
576
Hi!

I upgraded my son's PC for him - I'm not new to PC building having been doing it for decades, but this one has me stumped!

Bought new case, motherboard, RAM and CPU.

We have :-

Ryzen 7 5800x
MSI X570 Tomahawk Motherboard
32GB of Corsair Vengeance C18 memory
Corsair 5000x RGB case.

We reused his PSU (Corsair 1000W I think) which was fairly new anyway, and his MSI 2080Ti GPU

CPU is cooled with a 240mm Corsair AIO and I put Noctua NT-H2 thermal paste on the CPU.

The PC powers off randomly and the power cable needs to be unplugged and plugged back in before it will power on again.

I have updated the BIOS to the latest to see if it fixed the issue, and the only change made within it is I have enabled the XMP profile for the memory.

I also updated the chipset drivers and all windows updates.

I have no idea how to troubleshoot this - there is nothing in the event viewer apart from the notification of an unexpected shut down.

He has HWInfo running and says that all temperatures show as fine.

Any ideas???
 
Oh, one thing that may or may not be relevant... I only plugged one PSU cable on the motherboard for the CPU - I believe the other is only needed if overclocking, but happy to be corrected.

He also said most of the time the power off occurs when he is playing WoW and dies in a dungeon, when releasing corpse it can power off. Not exclusively then, but has happened multiple times in that scenario.

Sounds bizarre!!
 
Yeah, the 8 pin is plugged in, the 4 pin is empty. I can try that - he doesn't live with me so I will have to go add the extra cable.
 
I'll try some of the above.. it's a clean install of Windows 10 also, as I never like to do such a major change and keep the current OS.

I'll report back! However.. after having a search around, there are a good few issues with X570 Tomahawk boards.. may look at changing it out if possible.
 
Apparently it has never done it whilst idle. The thing that baffles me is that I think that the power cable needs to be unplugged before you can power back on. Think that would indicate some sort of overload protection on the PSU?

No overclocks other than default XMP profile enabled.
 
Good idea with the stress tests. Not using any molex or adapters. It can go weeks without doing it, and then the other day powered off 3 times in an hour. Most weird and very hard to troubleshoot.

If can find a way to make it happen that would be a start!
 
Apparently he just told me he ran Ashes benchmarks for CPU stress test and also GPU stress test and it was fine.

Oh.. he says he ran Unigine and it was fine. Doh...

And he says it happens playing Serious Sam or WoW, but never happens in CoD... I'm totally baffled!
 
I've arranged to go round next week - think will strip all the power cables out and redo them for a starter and then see what is what.. will check some of the above suggestions and questions whilst there!
 
So.. an update on this..

He managed to find something which would reliably reproduce the power off issue - the initial cut scene in FFXIV Online would cause the PC to power off every time.

This pushed me towards an issue with the GPU and when I looked, the 2 8 pin connectors were on the same cable and the 6 pin on a separate one. I switched them so that a 6+8 were on one and the other 8 pin on the other cable.

All works fine now.. (fingers crossed).

It could have been just reseating the cables, or maybe it did matter how the connectors were powered.. who knows, just glad I managed to figure out the issue!!
 
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