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Computer keeps shutting off randomly. Help please

Last response: in Systems
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July 14, 2012 4:27:48 PM

So my computer started off shutting off randomly a couple months ago. I would be in the middle of something and then it would just shut off, not shut down, and then it would sometimes restart itself sometimes not. It would happen sometimes twice a week sometimes once a month. Last night however it happened nine times. I booted into BIOS and it happened there so correct me if I'm wrong but that should rule out the HD's? I'm thinking its either the motherboard or the PSU. Is there any way to tell other than trying new ones of each? I don't have a spare PSU so I'd have to buy either one and don't wanna get the wrong piece.

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a b B Homebuilt system
July 14, 2012 4:32:21 PM

It more than likely the power supply. If not then possibly the motherboard. What are your system specs and what type of power supply are you running? How long have you had it?

What country do you live in? Staples has a wonderful "No Questions Asked" return policy. You could try a power supply from them and if it still doesn't work you can take it back for a refund within a week.
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July 14, 2012 4:45:28 PM

I have an Antec CP-1000 1000W PSU its 2 years old.
MB - ASUS P6X58D Premium
CPU - i7 930
GPU - Radeon HD 5870
RAM - 3 x 2gb g.skill at 1600.

I'm in the US so maybe I'll check Staples out like you said.
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a b B Homebuilt system
July 14, 2012 6:07:51 PM

link575 said:
I have an Antec CP-1000 1000W PSU its 2 years old.
MB - ASUS P6X58D Premium
CPU - i7 930
GPU - Radeon HD 5870
RAM - 3 x 2gb g.skill at 1600.

I'm in the US so maybe I'll check Staples out like you said.


Yeah, you will only need a good 500-600w PSU and they sell Antec there.
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July 14, 2012 6:17:57 PM

Sounds like a plan thanks. Though there are times when it doesn't happen for days, possibly even a week or so. Is there any other way to rule out the PSU other than trying a new one? I guess it even if it happens with the new one it doesn't hurt to have an extra psu lying around for such occasions.
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a b B Homebuilt system
July 14, 2012 6:23:50 PM

Go into BIOS and under PC Health or PC Monitor something along those lines it will list all the temps and voltages. Give the voltage it says for +12v, +5v, and +3.3v. I'll tell you if the voltages are within tolerance.
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July 14, 2012 6:28:38 PM

ok 12v = 12.081, 5v = 5.046, 3.3v = 3.264. And thanks so much for your help and quick responses
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a b B Homebuilt system
July 14, 2012 6:32:06 PM

Those are all in check. Run a program like HW Monitor or OCCT and put a load on your PC, put a load on both CPU and GPU and then using one of the programs mentioned tell me the voltages...
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July 14, 2012 6:46:37 PM

Ok I couldn't figure out how to load both cpu and gpu at same time, not sure if that's what you meant but:

gpu I got 11.8, 5.19, 3.28
cpu I got 11.86, 5.17, 3.3

this was using occt

EDIT: nvm found psu load which did both, came out to be 11.74, 5.14, 3.26
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a b B Homebuilt system
July 14, 2012 7:09:34 PM

Those look to be within a decent enough range. It could be that they dip below tolerance at the times when you get the random shutdowns. I still think it is a good idea to try a different power supply.
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July 14, 2012 7:18:04 PM

Best answer selected by link575.
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July 14, 2012 7:18:32 PM

Alright thanks for your time. Off to Staples I go.
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