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Computer randomly shuts off during high power load?

post #1 of 14
Thread Starter 
I've been having issues with my custom-built PC ever since I overclocked it to 4.6GHz (1.31V) a couple weeks ago. I tested the overclock with Prime95 and the temps were getting up to 80-82. I decided that was too much and turned off the test. A few seconds later, the computer shut off. It didn't shut down, it just powered off as if there was a power outage. A few seconds after being off, the computer tries to turn itself back on by itself. It then proceeds to turn itself back on and off again in a power cycle.

Since then, I have taken the computer apart and put it back together (checking for shorts under the motherboard, etc.). After putting it back in the case, I was able to get the computer to boot and go to the desktop. I thought I had somehow fixed the issue because I didn't have the issue for a few days. Well, now the issue has turned back up. It seems that the issue mainly comes about when I am playing a game. I have a feeling that it could be the power supply unit going bad possibly from the overclock that I did previously. I'm currently able to use the computer with no issues at all by having my graphics card out of the computer (hence lower power draw from the PSU).

I went into the bios and the voltages are reading pretty accurately. 3.3V, 5V, and 12V all show slightly above their values (i.e., 3.3V is showing 3.34V, etc.). To add to this, I opened HWMonitor and I see something strange. The 12V reading is showing only 7.08V?? This is likely an error in the program but I found it very strange...

I'm just stumped on what this issue might be. I think I am going to buy a brand new HX850 (I guess now is a time as any to up the wattage for possible futureproofing?). If I can get this issue resolved, I will probably be less likely to tinker with overclocking because I spent $3k on this system and I don't want to throw that money away by destroying my components (or perhaps I will be more careful not to pump the voltage up so high next time...).

Anyway, what do you guys think? Is it the PSU? I'm thinking it is just because 9/10 times, the power off occurs when I'm playing a game while listening to music on my headphones. When gaming, the power draw is increased so I'm sure that is putting stress on the psu and it the psu can't handle the load from being unstable, then it is powering off because it can't handle the load. I'm hoping this is the case because I would rather not have to pay to ship my components into RMA...

Edit: I forgot to mention that the computer was reset to defaults in bios after the first time the computer powered off. So, it was still doing this even with nothing overclocked (CPU, GPU, RAM, etc.)

Here are my specs for reference:

Intel Core i7 3770k stock
EVGA GTX 690 stock
Asus P8Z77-V Premium
G.Skill Ripjaws X 8GB (2 x 4GB) 2133 @1600 in bios
Corsair HX750 750 Watt PSU (Sleeved with MDPC-X)
Crucial M4 128GB SSD
WD Caviar Black 1TB HDD
Asus 24x DVD Drive
Lamptron FC9 Fan Controller

Custom CPU Watercooling Loop:

XSPC Raystorm Intel CPU Waterblock
XSPC RX360 Extreme Performance Radiatory V2
Swiftech MCP655-B Water Pump
FrozenQ Liquid Fusion V Series 250ml Reservior
3 x Yate Loon Medium Speed Fans
Edited by BradleyS - 9/13/12 at 11:27pm
post #2 of 14
The voltage you put through the chip isn't that high at all.

My self though, I wouldn't be running all that kit on a 750w PSU. (someone else would probably know better than I would, but I think that is WAY to low for what you're powering)
Can you get a PSU tester? $20 investment that is well worth it.
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post #3 of 14
750W is more than adequate for this build, New tech uses less power and with even 4 way gtx 680 sli your not going to top 600W full system power draw,

I had simular symptoms with a previous build and that turned out to be a faulty psu
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post #4 of 14
It could be a faulty psu. Your voltages doesn't sound like the problem. I am concerned with your cpu however. How is it 80-82 with water cooling? Should be a lot lower unless your ambient temperature is really high. Is the block all the way on? I know with the raystorm there is a specific port to be used as the inlet...you could have the inlet be the wrong port.
post #5 of 14
Thread Starter 
Quote:
Originally Posted by Chewy View Post

750W is more than adequate for this build, New tech uses less power and with even 4 way gtx 680 sli your not going to top 600W full system power draw,
I had simular symptoms with a previous build and that turned out to be a faulty psu

Yeah it's seems like it could be the psu the most but I won't know unless I swap it with a new one.
Quote:
Originally Posted by pkkawakitty View Post

It could be a faulty psu. Your voltages doesn't sound like the problem. I am concerned with your cpu however. How is it 80-82 with water cooling? Should be a lot lower unless your ambient temperature is really high. Is the block all the way on? I know with the raystorm there is a specific port to be used as the inlet...you could have the inlet be the wrong port.

Idk how it went up to that temp with the watercooling. I checked that out during the original installation and I do have the in-flow going into the inlet on the block. I've opened the block before to see if there was any blockage and there wasn't any problems that I could see. I reassembled the block the same way that I opened it. It could possibly be something to do with the sprayer part within the block. It could be put on backwards by the factory or something...idk. But I guess you gotta consider that IvyBridge runs pretty hot and I had the cpu overclocked to 4.6 Ghz with 1.31 V. :-/
post #6 of 14
Power off at load is classic psu. It's not random if it happens at load. wink.gif
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post #7 of 14
Thread Starter 
Quote:
Originally Posted by tsm106 View Post

Power off at load is classic psu. It's not random if it happens at load. wink.gif

Well, the computer has actually shut itself off during times of low power use. One time it was during internet browsing while listening to music and the other time was when I wasn't using the computer at all but I had left it on during the day to download a couple of games on Steam. I came back later in the day and saw that the computer had been restarted by itself.. tongue.gif
post #8 of 14
Definitely sounds like a PSU failing to me have you checked to see if the PSU is blowing hot air under load,

Also as some one else mentioned try getting a PSU line tester,
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post #9 of 14
I've had the same issue in the past and it was my PSU. The unit you listed would be more than adequate. Maybe its just going bad. Do you have another PSU you can use to test? From all you've mentioned it definitely sounds like a PSU-related issue.
post #10 of 14
Another vote for PSU, although it's a bit surprising seeing as it's a single-rail unit.

Something else to check are all your voltages in BIOS. CMOS clear values are not always right for stability.
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