Possible PSU Failure?

karlf1986

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Aug 14, 2010
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18,510
Specs are:

I3770K
MSI Z77A-G45 (I think)
2x4gb Corsair Vengeance 1600mhz ram
MSI R7950 GPU
OCZ ZT 550W PSU

Think that's all you will need.

Anyways my PC randomly switched off (was playing FFXIV) and upon rebooting it instantly switched off after 1 secs, Fans spun and lights came on apart from mouse,keyboard and no display which i found odd, I Removed one stick of RAM and it rebooted so i thought it was a faulty stick until it done it (after about 5 hours of the PC being on) again i changed sticks and was fine for about 1 hour until i happened again.

I couldnt get it to to post i just had fans spin with no mouse,keyboard or display so i stripped the PC and re-done the thermal compound and checked everything over and seemed fine once put back together had the same issue so bought a LCD PSU Tester and left for around 20mins and voltages were within the limits so thought it had to be motherboard but as SCAN advised (they would be who i would RMA motherboard through) the PSU tester only tests basic with no load and told me to get another PSU to check as sounds more PSU related then motherboard, Im currently in the process of getting another PSU for testing but thought would come here for some insight from anyone with similar issues.

Oh i also built the pc out of the case (Just power,motherboard and ram connected) for testing incase there was a short anywhere and the pc lasted about 2mins then off with 1 stick and lasted around 1-2 seconds with 2 sticks in.

Sorry for how this has been typed im currently using a tablet.

Thanks Karl.
 
Solution
Without parts to swap out it's really hard to separate out PSU, CPU and mobo failures. You just have to guess by the odds sometimes and the likelihood of PSU failure is higher than Motherboard failure which is higher than CPU failure.

You'll know for sure if you swap for an alternative PSU. You could also try taking out the GPU which is the most demanding part of your system power wise and try running just the igp. If it runs for longer then it's even more likely to be the PSU at fault.

plywrlw

Admirable
It seems very likely it could be the PSU, OCZ's are quite hit and miss! If you can swap test it and find out for sure then do that before returning your motherboard.

If the PSU is the problem try and replace it with a quality unit like a Seasonic, EVGA Supernova B2 or G2 or XFX (other quality units exist see this list http://www.tomshardware.co.uk/forum/id-2263985/power-supply-tier-list.html)
 

karlf1986

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Aug 14, 2010
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18,510


Yeah il be tempted to buy a better branded (Seasonic) and sell the replacement OCZ, Its the first issue ive had in nearly 2 years of the build.

 

plywrlw

Admirable
Without parts to swap out it's really hard to separate out PSU, CPU and mobo failures. You just have to guess by the odds sometimes and the likelihood of PSU failure is higher than Motherboard failure which is higher than CPU failure.

You'll know for sure if you swap for an alternative PSU. You could also try taking out the GPU which is the most demanding part of your system power wise and try running just the igp. If it runs for longer then it's even more likely to be the PSU at fault.
 
Solution

karlf1986

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Aug 14, 2010
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18,510


Yeah im going to try get another PSU to test, I have taken the GPU out already and tried and shuts down after a few seconds.