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Computer Randomly Blackouts

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  • Computers
  • Monitors
  • Components
Last response: in Components
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September 10, 2014 8:09:04 PM

Hello all,

I'm a first time builder and I recently just built a computer. I powered it on and everything was going smoothly. After a couple of hours of of being on, the monitor had no signal and the computer blackout. However the computer was still running, the fans were all still on and the hard drive was still spinning. (Im not sure about the other components) So I was very confused on what was going on. I played a long song to see it would still play when the blackout happens to check if it was the monitors fault. The song stopped playing when the blackout happened so I knew it was my computer.

Then I thought if my computer was overheating, so I ran hardware monitor and the CPU temps were in the mid 20s and sometimes going into the 30s. I then ran prime 95 and heaven benchmark at the same time and was at the 40-50s range.

After that I asked my friends Dad which is a computer guy and he said it was my CPU overheating. But my temps were very low so I re-did the thermal paste with some arctic cooling mx-4 hopping it would fix it, but did not.

One thing that I did notice that my power supply was very hot after I shut down the computer so I'm suspecting its the PSU and the blackouts happen randomly both in causal and heavy workloads and happen more often when I turn it right back on after the blackout. Also I have to hold the power button for it to completely shutdown.

P.S. I have not over clock anything

These are the parts of my computer:
AMD FX-8320
Radeon r7 265
ASRock 960GM/U3S3
adata xpg v2 8gb ddr3 1600
Seagate barracuda 1TB 7200 RPM
EVAG 500 B
Cooler Master N200
Arctic Freezer 7 Pro Rev.2
Windows 8.1 64 bit

If you have any sulotions on my problem, it would be highly appreciated. :-)

More about : computer randomly blackouts

a b C Monitor
September 10, 2014 8:29:44 PM

It could be your PSU overheating. Do you have another PSU you can try?
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September 11, 2014 3:58:21 PM


I currently do not have another power supply to try sadly but I did find out my power supply fan is not spinning. (Can't believe I didn't notice that) At first I thought it was a power saving feature when a power supply won't spin until it consumes a lot of power. So I ran prime95 and heaven benchmark at the same time and the computer blackout at 3 minute. Could this be the case?
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a b C Monitor
September 11, 2014 5:36:24 PM

If your PSU fan isn't working - that would be the cause. Some PSUs you can replace the fans....Given your build - I would suggest getting a good 600-700W PSU from Antec, Corsair or Seasonic. Cheaper isn't always better on the PSU - a lot of them use super cheap fans, others don't regulate the power effectively.....
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September 11, 2014 7:28:28 PM

Thank you so much for your help! This was the last hope before highering someone to diagnose the problem!
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!