Random PC shutdowns (PSU or GPU?)

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dcsskate

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Feb 27, 2014
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Hey everyone,

I built a new PC 3 weeks ago and so far it has been performing great, with absolutely no issues. This week it has randomly been shutting itself off, as if I just pulled the power cord. It has happened twice while idling and a few times while gaming (FFXIV). Sometimes I can leave it on for hours and sometimes it will shutoff quickly after being on for a few minutes. I know it is not overheating because I have been checking the temps. The CPU avg is at 30C and GPU around 40C. Which led me to believe it might be an issue with my PSU? The only reason I think it could have something to do with my GPU is because my monitors (2x) randomly reset (turned off then back on) twice in the past week. Also, I don't have any spare parts to swap out the PSU or GPU. Any suggestions/help is greatly appreciated.

Here are my PC specs:

CPU: Intel i7-4770K
GPU: EVGA GTX 780 Ti
PSU: Corsair AX760
MOBO: MSI Z87-G65
RAM: GSKILL Ripjaw X Series 16GB (8x2)
HDD/SSD: Western Digital 1TB + Samsung 256GB SSD

Thanks for your help :)
 
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Check all the wiring. Reseat your ram, graphics card and any other pcie devices. Make sure the heatsinks are firmly secured. Make sure all of your IO devices are plugged in correctly (hard drives, cd rom drives etc). Last but not least, make sure there's nothing on the motherboard that could short it out. Also, make sure a cat isn't standing on your power switch (yes, that happened to me).

Last but not least, if you have a builder friend you can test a different PSU. If that doesnt work then buy a new one with intent to return it if it doesn't help with the issue.
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beshonk

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May 26, 2011
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Check all the wiring. Reseat your ram, graphics card and any other pcie devices. Make sure the heatsinks are firmly secured. Make sure all of your IO devices are plugged in correctly (hard drives, cd rom drives etc). Last but not least, make sure there's nothing on the motherboard that could short it out. Also, make sure a cat isn't standing on your power switch (yes, that happened to me).

Last but not least, if you have a builder friend you can test a different PSU. If that doesnt work then buy a new one with intent to return it if it doesn't help with the issue.
 
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Adroid

Adroid

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Jul 2, 2009
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Could be either.

Are GPU drivers up to date?
Does it happen when just 1 monitor is hooked up?

I'm actually leaning towards the PSU being faulty, but I would try to rule out the GPU too. Complete power out sounds like a power problem, which could create all types of other issues. GPU issues more likely to cause random reboots or artifacting.

It couldn't hurt to try the steps beshonk listed above - I would start there.

PSU going bad after a few weeks isn't unheard of either.
 
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dcsskate

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Feb 27, 2014
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This seemed to help, thank you. I reseated my ram and GPU. What I also noticed was on my PSU there was a hybrid mode that was enabled. I just switched it back to normal mode and that seemed to fix my issue.
 
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Adroid

Adroid

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You might try to enable hybrid again to just to know if your PSU is defective. That series has a good warranty and they would probably cross ship you a PSU - meaning you wouldn't even have to rewire you could just swap the box when the new one arrives and plug the same cables in.

Just a thought.
 
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