PC randomly shutting off in a gaming session (with some complications)

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chrisw85

Reputable
Feb 13, 2016
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0
4,510
Hey there,

I have the problem that my PC randomly shut off while i was playing GTA, as i have many times before. It shut off with an audible click, and i wasn't able to turn it on untill i switched powercable. The lights in my graphics cards also shut off (which are on even when the pc is off).
I was able to successfully boot with the original cable, and i haven't really tested it more since. Is it safe to use my PC with the old cable, or is it a problem with my PSU or another component? Or could it be some temperature issue?
Here are my specs:

i5 4690k (factory clocked)
msi z97 sli krait edition
16 GB ram
Corsair cx750m PSU
2 way sli with gtx 770

Thanks,
Christoffer
 
Solution
HamBown81

Based on your system specs, you could be pulling 600W or more under heavy load. It is likely that your PSU automatically shut down to protect itself due to over-temp or some other condition. You should blast the dust out of the power supply if you have not done so.

It may just be that it wasn't able to pull enough current through the other cable you were using or your PSU is being overdrawn.

You can test it by shorting two specific pins on the 24-pin connector and using a multimetre to check all of the voltages are within specifications. HWMonitor and other tools will also display the...
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HamBown81

HamBown81

Commendable
Aug 3, 2017
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That audible click is normally the PSU shutting off. What "old cable", like the power cord going from the wall to the PSU?

You should test your power supply to make sure it isn't pooched but using the power cord that came with it (if that's what we are talking about) shouldn't be an issue.
 
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HamBown81

HamBown81

Commendable
Aug 3, 2017
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Based on your system specs, you could be pulling 600W or more under heavy load. It is likely that your PSU automatically shut down to protect itself due to over-temp or some other condition. You should blast the dust out of the power supply if you have not done so.

It may just be that it wasn't able to pull enough current through the other cable you were using or your PSU is being overdrawn.

You can test it by shorting two specific pins on the 24-pin connector and using a multimetre to check all of the voltages are within specifications. HWMonitor and other tools will also display the relevant voltage readings if you can get into Windows.

Lots of good guides online, just search "test power supply"
 
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Solution
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boosted1g

Titan
Jun 12, 2013
14,846
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74,965


Unfortunately though, testing under idle windows and testing under the full gaming load are not the same.
So testing voltages with multimeter does not paint a full picture.

First thing is first, make sure you have at least a 16awg power cable. If you are using a thin one from a different power supply than the CX then you should find the proper one.

If you have a green letter CX series PSU these where known to have poor capacitor aging and it is very likely that your 750w PSU can no longer handle the 600w you need.

 
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HamBown81

HamBown81

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Aug 3, 2017
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You can monitor load voltages during gaming if you are able to get it going with the alternate cable. If it is the one that came with the PSU it should be adequately rated.

However, I suspect (as boosted1g noted) that your PSU can no longer handle what you are asking of it.
 
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