Computer shuts down during games, various tests done


I've just put a new CPU, motherboard and RAM in my system and now when playing a game or during Heaven Benchmark 4.0 the computer will shut down. When it shuts down, the only way to turn it on again is to unplug the socket from the wall and put it back in. Unplugging the cable from the PSU and plugging it back in again doesn't let me switch the computer on.

It's happened after 10 - 15 minutes of playing a game and within 2-3 minutes when running Heaven benchmark 4.0.

When the computer shuts down during the benchmark the CPU temp is usually around 30C and the GPU temp is anywhere from 60 - 65C

I've monitored the CPU temperature when running Prime95 and it doesn't go any higher than 42C.
I've run Memtest86 on the RAM and there hasn't been an errors.
I've run OCCT without any crashes and temperatures seem fine.

The system parts are:

CPU: AMD FX 8350 (brand new)
Motherboard: ASUS M5a99x Evo R2.0 (brand new)
RAM: Corsair CML8GX3M2A1600C9B Vengeance Low Profile 2x4GB DDR3 1600Mhz CL9 XMP (brand new)
GPU: MSI R9 270 2GB (2 months old)
CPU cooler: Cooler Master EVO 212 heatsink and fan (brand new)
PSU: WinPower +PLUS 550W 20+4pin 120mm Bearing Fan PSU (1 year old)
Harddrive: WD 7200 1TB (1 year old)

My initial thought was that it was the PSU overheating or failing in someway as it is a very cheap model and due to the fact that I have to unplug it to get the system to turn on.

I don't know how to monitor the temp of it but from touching it when the system crashes it's not very not at all.

Any advice would be a great help, if there other tests I should run or something obvious that's the problem, before I rush out and buy a new PSU incase this isn't the problem.

4 answers Last reply Best Answer
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  1. Best answer
    Even if it turns out that it isn't the PSU (I suspect it is), you'll still want to replace it with a higher quality unit as soon as budget allows. You can try cleaning out your PSU to see if that helps it's stability some but it really should be replaced.
    Antec, Corsair, SeaSonic, XFX have some nice PSU's in their line-ups that shouldn't break the bank
  2. Thanks for the quick reply,

    I think I'll go out today and see if I can pick one up, the PSU I have came in a pre built system and I didn't realise till I looked it up today just how cheap it was! I've used a few different PSU calculators and they all say wildly different amounts are need varying from 370w to 940w!
  3. Some of the PSU calculators are a bit generous. Your system shouldn't need any more than 550W (I'd suggest a quality 450W or greater).
  4. Just installed a new PSU, Corsair CX500M. I've run Heaven Benchmark 4.0 once and it made it the whole way though so it seems it was the PSU, not tried any games yet but hopefully that's it sorted.

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