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PSU is dying...I think ?

post #1 of 27
Thread Starter 
My rig recently started acting up: while gaming, the whole computer suddenly shuts down and after a few seconds, reboots.
Sometimes, the shutdown happens right after I start any game and sometimes I can go 10 hours straight without any issues.

This has happened quite a few times and at first, I thought there was something overheating which led to the shutdown.

However, after some logging and careful examination of my temps, nothing goes past 60 degrees celcius.
Here are my specs:
- 3570k @ 4.6ghz (each core reaches about 60 degrees while gaming)
- 580 SLI (each gpu reaches about 45 degrees while gaming)
- 16 GB ram (not overclocked)
- PSU is Corsair CMPSU-1000HX
- CPU and GPU are watercooled (custom loop)

In the past, I had a few issues with both my GPUs (which aren't totally fixed yet but I somehow managed to work around it) so I thought the GPUs were at fault.
I first deactivated one GPU (the one I know would be the culprit if the issue is GPU related, by disabling it in Windows and unplugging the PCI-E power cords) and weirdly enough, the computer shuts down even more often now. Sometimes right after launching a game, during intro movies and stuff.

In order to entirely rule out the GPUs, I tried stressing only the CPU/memory/chipset with Prime95.
After a few tests, sure enough the computer shut down unexpectedly.

So my issue is either the CPU, motherboard, memory, PSU or a combination of those.

I could easily test the PSU so I hooked up a second PSU I have to simply feed power to the GPU and ease the load.
So I have this setup:
- single 580 -> CMPSU-620HX
- rest of the rig -> CMPSU-1000HX

After a few hours of gaming, nothing happened, Everything is stable.

That's why I suspect the PSU is dying.
Do you guys have any other suggestions ?
post #2 of 27
might want to get yourself a psu tester. they are less than $20 on newegg.
post #3 of 27
Thread Starter 
I'm on my way to the store now and will get a PSU tester. Thanks for the suggestion.

However I think the voltages will turn out just fine. Amperage on the other hand might be the issue. The PSU might not have enough life in it to be able to supply the required amps.
Is there any way to easily/cheaply test that ?
post #4 of 27
I would recommend a multimeter instead of a dedicated psu tester. I have multiple of both, and while the dedicated testers are convenient at times, they are very limited, and after getting comfortable with a multimeter it is all I ever use now.
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post #5 of 27
Thread Starter 
Got myself a multimeter since they were twice as cheap. I'll test the PSU tonight and will post later what I find.
post #6 of 27
Thread Starter 
All readings (3.32v, 5.01v 12.07v etc) are within expected ranges. I tested on the ATX plug as well as PCI-E power cords.
I'll keep on gaming for a few hours with both PSUs plugged in and if it goes on smoothly, time for a new PSU, unless anyone has any other suggestions/things I could try ?
Edited by Gauvi - 11/7/14 at 2:56am
post #7 of 27
It could be your RAM or motherboard if its not the PSU.
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post #8 of 27
Thread Starter 
After gaming this week end, no shutdowns whatsoever, which means I'm now in the market for a new PSU (although my current hack job of two PSUs seems to work pretty well, I just need to remember turning on the PSU feeding power to the GPU before turning on the computer itself)

I have most of the time gone with Corsair but thinking of trying something new for a change.
Also, I likely won't need as much power (sticking with a single GPU) and in the future, I likely won't go SLI/CFX either.
I am also considering shrinking down my future rig (currently own a Corsair 700D) to a mATX case or smaller if I can manage to do it, while still maintaining the "gaming" label (and when that happens, the watercooling will likely go away, I'll go back to regular air cooling)

Any suggestions ? I've heard pretty good feedback from Silverstone PSUs.
Edited by Gauvi - 11/9/14 at 7:49pm
post #9 of 27
Quote:
Originally Posted by Gauvi View Post

After gaming this week end, no shutdowns whatsoever, which means I'm now in the market for a new PSU (although my current hack job of two PSUs seems to work pretty well, I just need to remember turning on the PSU feeding power to the GPU before turning on the computer itself)

I have most of the time gone with Corsair but thinking of trying something new for a change.
Also, I likely won't need as much power (sticking with a single GPU) and in the future, I likely won't go SLI/CFX either.
I am also considering shrinking down my future rig (currently own a Corsair 700D) to a mATX case or smaller if I can manage to do it, while still maintaining the "gaming" label (and what that happens, the watercooling will likely go away, I'll go back to regular air cooling)

Any suggestions ? I've heard pretty good feedback from Silverstone PSUs.

ive heard EVGA has some very reputable units in the 650W-1000W range
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post #10 of 27
evga 750W G2
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438017&cm_re=evga_750_g2-_-17-438-017-_-Product
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