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Problem description: Yesterday, my PC had a random crash where the display driver appears to crash and requires a power cycle restart. When I powered down and went to power back up, the system powered on for a split second before immediately shutting down. Subsequent attempts to power on do nothing at all unless the PSU is switched off and presumably the capacitors drain. Each time it is exactly the same, PSU relay clicks, split second flash of LEDs/RGB and fans spin up before immediately powering off. I can't get to POST or BIOS. I left the PSU disconnected overnight and tried to power it on again this morning but no dice. Split second flash of LEDs and then nothing. Because it happens to quickly there are no fault codes or indicator lights to work from. It has the feel of something either immediately shorting out or something powering down to prevent possible damage. Attempted fixes: Tested PSU with a multimeter, all 24 pins are reporting correct voltage of 3.3V, 5V and 12V on the correct pins. Tried powering on without GPU connected to power or PCIe. The PSU successfully starts and remains on powering 10 fans and custom water loop when the ATX connector is jumped. Reseated RAM. None of these have made any difference at all. Recent changes: Around 3-4 months ago I Switched from Ryzen 9 3900X to Ryzen 9 5950X and switched from an RTX 3080 to a 7900XTX - all brand new components. I did a safe mode DDU driver clean before switching out. Since then I have had what I thought were intermittent driver crashes where the system will freeze, the driver will attempt to recover and fail to do so. The screen remains frozen in place, any sound playing will continue but the only way to recover is a hard power cycle. 50% of the time, when I reboot into Windows the GPU is disabled in device manager and I have to enable it and restart to get going again. I had thought this was down to AMD drivers being trash, but now I'm wondering if this is related? Every time I had a crash like this I would check Windows Event Log and there was no mention of any errors, it was almost as if the crash was undetected despite AMD's drivers resetting all customisations to stock settings. -- Operating system: Windows 11 Pro System specs: -Ryzen 9 5950X -Asus Strix X570F Motherboard -Radeon 7900XTX -4x8GB 3200MHz DDR RAM -Seasonic Prime GX1000 PSU -Generic 2,5Gbe PCI NIC -1TB PCIe nvme -512GB PCIe nvme -2x SATA SSDs Location: UK I have Googled and read the FAQ: Yes - all examples of similar symptoms are from people who are building a new PC whereas my system has been built for around 2 years with some upgrades done months ago. My PC hasn't been moved or jostled and I can't find any loose connections, it's almost as if something blew last night and given the fact that the system will refuse to power on despite what seems to be a perfectly healthy PSU (a Seasonic one, at that) I'm inclined to think the motherboard has given up the ghost.
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Apr 30, 2023 15:03
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| # ? Apr 24, 2024 20:56 |
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Yes, it's possible it's a failing motherboard. I'd try the old GPU if possible and see if that has any effect. You could also try using one stick of RAM and disconnecting all the drives and NIC and see if it POSTs. Also, a PSU showing the correct voltage doesn't always mean it's 100% fine. So trying another one is another option. Charles Leclerc posted:I had thought this was down to AMD drivers being trash, but now I'm wondering if this is related? Bad drivers alone wouldn't cause the failure to POST but a damaged card could show similar symptoms.
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Apr 30, 2023 22:23
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Thank you - I can pull the PSU from my server and try that one, it's a lot lower wattage but it is brand new and I think it should be able to power the motherboard and CPU. I don't have the 3080 anymore, but I could pull the K2200 from my server which has the added benefit of not needing any more power than the PCI slot.
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Apr 30, 2023 22:31
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Solution found - just as I was steeling myself to shut off and disasemble my server I noticed I had a brand new C13 cable in my box of 'random computer poo poo that may one day be useful' and wouldn't you know it, after switching out the old for the new, everything works perfectly again. I've even had a whole day of uptime without any of the GPU crashes. Thanks for weighing in Zogo, looks like I got lucky this time. 
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May 1, 2023 16:56
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