Solved PC randomly shutting down, not heat related.

April 18, 2013 at 09:59:54
Specs: Windows 7, 4Gb
My computer is randomly turning itself off. I have surge protection disabled at the moment to type this message because it would literally, load up then shut off.

I went to my BIOS, and enabled surge support. Then the next time it happened this message came up after it booted up again:


These are the specs of my PC (according to Speccy):

Operating System
Microsoft Windows 7 Ultimate 64-bit
AMD A8-5600K 63 °C
Trinity 32nm Technology
4.00 GB Single-Channel DDR3 @ 809MHz (9-9-10-24)
Generic Non-PnP Monitor (1024x768@60Hz)
AMD Radeon HD 7560D
Hard Drives
932GB Hitachi HDS721010CLA332 ATA Device (SATA) 29 °C
932GB SAMSUNG HD103UJ ATA Device (SATA) 23 °C
Optical Drives
MagicISO Virtual DVD-ROM0000
ATAPI iHAS124 B ATA Device
High Definition Audio Device

My PSU is ATX-500 (500w)

The voltage readings according to my BIOS show:

3.3v - 3.344v
5v - 5.215v
12v - 12.002v

Now, is this a case of the PSU being faulty and therefore needs to be replaced, or is there a way of altering the PSU voltage?

See More: PC randomly shutting down, not heat related.

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April 18, 2013 at 10:12:43
You don't give a maker's name for the PSU; never a good sign. Buy a decent one.

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April 18, 2013 at 13:29:37
"AMD A8-5600K 63 °C"

Not heat related? Is that the temp at idle or under full load? The max operating temp is 74°C.

Otherwise, the cause is most likely the power supply. As ijack said, no make/model or specs is never a good sign.

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April 18, 2013 at 18:27:46
✔ Best Answer
It does sound like the power supply, especially if it is a cheap one (no-name or cheap name brand).

You have to be a little bit crazy to keep you from going insane.

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Related Solutions

April 19, 2013 at 02:30:48
Thanks guys, a new PSU i shall get then.


Not heat related? Is that the temp at idle or under full load? The max operating temp is 74°C.

When i bought this motherboard bundle, the CPU and heatsink where already installed in factory. And even then i was getting temps like that. I've since re-appllied thermal paste which cooled it for a while but the temp is back to the 60's, then last night it went up to 90 degrees when i was converting video's to DVD format.

Later, im going to clean off the termal paste, reapply it, and invest in a water cooling system.

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April 19, 2013 at 08:58:01
"and invest in a water cooling system"

Totally unnecessary. Just apply the paste properly. See your other thread for a pic & instructions.

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April 20, 2013 at 11:18:45
OK, i completely removed the thermal paste off both the CPU and the heatsink using WD-40 and then 99% achohol (as per a tip i got from this site).

Re-applied thermal paste by putting a blob on the CPU as per the many video tutorials on YouTube.

The result is pretty much the same. It idles at around 45 degrees then when i went to convert a movie with Nero the temp went up to 100 degrees!! I aborted the conversion. This never happened with my last PC. Im totally at a loss.

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April 20, 2013 at 15:52:18
It sounds like you have another issue as well. You are probably overvolting your CPU. Reset defaults in your BIOS and see if that helps.
Make sure that you have a rear case fan high up set to exhaust the air OUT of the case. Options are a front fan down low blowing IN and if you have a bottom mounted power supply only, add a top fan as exhaust (OUT) as well. Do NOT use side fans since these disrupt the flow of air through your case.
Make sure that case wiring is bundles carefully to avoid interfering with air flow through the case.
Clean out all screens and filters to allow the most air to flow.
If you cannot feel the air just outside of your exhaust fan(s), replace them with higher CFM ball bearing models (look for high CFM but low DB (noise)).

You have to be a little bit crazy to keep you from going insane.

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April 22, 2013 at 04:43:13
Do you have the retail CPU heat sink/fan, or something else? Retail CPU comes with an AMD supplied heat sink and a 3 year warranty. Also comes with a thermal pad, which you would identify by the size of the residue when you removed the heat sink the first time.

Does the cooler fan run at high speed when the temperatures spike?

I would not recommend using WD40 as a solvent. WD40 is a lubricant. I use Lacquer thinner to clean both surfaces.

You may be applying the thermal paste wrong too. A blob may be too much.

What type of case do you have? Is the power supply on top or bottom? What about case fans?

When you touch 90c or 100c what are the system temperatures at that time?

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