Frequent restarts for no apparent reason. I'm stumped.

Altguard

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Jan 3, 2014
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10,510
This is my first go at asking any sort of question (I can usually just lurk and find the answers I'm looking for) and I'm a bit noobish, so please bear with me. I guess I'll start with my System Specs:

AMD Phenom II x6 1055T
4x2 GB GSkill Performance F3-12800CL9D-4GBNQ
Asus Crosshair IV Formula
EVGA GTX 760 2GB
64GB Kingston SSDNow V series
Corsair TX850M
Creative Soundblaster X-fi Titanium HD

This problem started the day after I ordered my GTX760 (I didn't actually have it yet, just ordered and on it's way), and happens on both it and my old video card (Sapphire HD 6870).

A few days ago my system started restarting back to the post splash screen while playing games (any game ranging from Crysis to mabinogi) as if someone hit the reset button on my motherboard. At first it only happened while playing games, then it started happening while just web browsing, and even started restarting in a loop the moment windows loaded up at one point.

I've cleaned out all fans and heatsinks, I've run memtest86 with 13 passes and 0 errors, I ran OCCT CPU stress testing for 10+ hours with no errors. When I tried the GPU test of OCCT with my old video card (Sapphire HD6870) it would restart immediately 4/5 times but starts fine w/ the GTX760.......and then eventually restarts. +12V is between 11.68 and 11.63 idle and under load, and +5V sits at 4.96V. No temperatures exceed 45C while stress testing with the exception of the video card, which peaks around 77C. I've performed a clean install of Windows 7 64bit twice now. I've both updated and rolled back drivers on all devices.

And I'm still randomly restarting doing general use, and guarantee restarting when running any game, no matter how hardware intensive the game is to run. Also, after some restarts, I'll get a sucessful post beep but hang at the splash screen for a few minutes (I don't know if this is relevant or not). Any ideas as to what could be going on is appreciated. I'm stumped.
 
Solution
Yeah, I just know that, generally speaking, any other kind of hardware failure - RAM, GPU, HDD, etc - will usually throw a BSOD before restarting.

It also makes me lean more towards a PSU problem when you say it occurs during general use, but always during gameplay, when more power is drawn.

Do you have access to another PSU you can use to test this?
You can try resetting the bios, take out the CMOS battery (oversized watch battery thing) for about 30 seconds, then pop it back in.

It sounds like a power supply going bad though, or potentially a short somewhere - if it detects a short anywhere it will automatically power down.
 

Altguard

Honorable
Jan 3, 2014
5
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10,510


Thanks for the advice. I tried taking out the CMOS battery for a bit, but it still resets. I also forgot to mention that flashing the bios to the latest version for my motherboard didn't work either.

I'm not familiar with everything that could cause a short, but there aren't any loose screws or frayed/exposed connectors if that means anything.

If this turns out to be the power supply, I'll be really dissapointed. I've heard nothing but great things about corsair PSU, but the first TX850 I got keeled over in 3 days, and I've only had this 2nd one for about a year.
 
Yeah, I just know that, generally speaking, any other kind of hardware failure - RAM, GPU, HDD, etc - will usually throw a BSOD before restarting.

It also makes me lean more towards a PSU problem when you say it occurs during general use, but always during gameplay, when more power is drawn.

Do you have access to another PSU you can use to test this?
 
Solution

Altguard

Honorable
Jan 3, 2014
5
0
10,510
I really wish I had an extra PSU around, but I don't and I'm flat broke now. When I get some cash I'll have a guy at my local hardware store test the PSU. Thanks for the help.
 

Altguard

Honorable
Jan 3, 2014
5
0
10,510


Yeah, it was unplugged. I also got a prompt to enter setup because the settings were reset once I put the CMOS battery back in and booted back up, so I'm sure that it was unplugged.