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HELP!!!! Random computer restarts while gaming. NO BSoD

Last response: in Systems
October 31, 2011 9:40:08 PM

This is my first post on Tom's Hardware so I did not know where to throw this.

I built my first gaming rig and I have been having a pretty frustrating issue that I am finding difficult to diagnose.
Here are my specs:

Intel Core i5-2500K Sandy Bridge 3.3GHz
ASUS P8P67 LE (REV 3.0) LGA 1155
GTX 560 DCII came OCed to 850 MHz
SeaSonic X750 Gold 750W
G.SKILL Ripjaws Series 8GB (4 GB x 2)
Western Digital 500GB 7200 RPM
Noctua NH-D14 Heatsink
Cooler Master CM 690 II Advanced

So here's the issue. When I am playing graphics-intensive games I get a random computer restart with no BSoD or warning of any kind. The temperatures of my GPU and CPU are fine up to that point (both below 58) and the problem is definitely not dust because I have only had the computer for a week. These restarts happen everytime I am playing BF3-- It could happen 10 minutes in or an hour in but it always happens. I tested each stick of RAM individually and together with Memtest86 and they seem to be working just fine. My GPU also functions fine when I stress test it. When I run IntelBurnTest the CPU passes. But when I run Prime95 my computer restarts almost instantaneously, again with no BSoD, very similarly to how it happens when I am gaming.
Any ideas on what is going on with my computer would be very helpful and much appreciated.
Thanks a lot
EDIT: I have been getting event ID 41 Task category 63 error Kernal power in event viewer every time my computer has been shutting down.
Log Name: System
Source: Microsoft-Windows-Kernel-Power
Date: 11/1/2011 8:24:59 PM
Event ID: 41
Task Category: (63)
Level: Critical
Keywords: (2)
Computer: James-PC
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

Event Xml:
<Event xmlns="">
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
<TimeCreated SystemTime="2011-11-02T03:24:59.658814400Z" />
<Correlation />
<Execution ProcessID="4" ThreadID="8" />

<Data Name="BugcheckCode">0</Data>
<Data Name="BugcheckParameter1">0x0</Data>
<Data Name="BugcheckParameter2">0x0</Data>
<Data Name="BugcheckParameter3">0x0</Data>
<Data Name="BugcheckParameter4">0x0</Data>
<Data Name="SleepInProgress">false</Data>
<Data Name="PowerButtonTimestamp">0</Data>

More about : random computer restarts gaming bsod

October 31, 2011 11:37:00 PM

Hmmm I'd go with an unstable Graphics overclock. Either up the voltage on it a bit or lower the clock.
October 31, 2011 11:52:26 PM

crewton said:
Hmmm I'd go with an unstable Graphics overclock. Either up the voltage on it a bit or lower the clock.

You think so?
Even though it came overclocked by DirectCU?
I forgot to mention that my cousin and I both got essentially the all the same components for our builds. His is working perfectly but mine-- not so much :( 
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November 1, 2011 12:58:24 AM

Same thing was happening to me the other day for the first time and it was because of my gpu OC. I would reset it if i were you and if that doesnt work send the gpu back
November 1, 2011 1:28:29 AM

I have seen stuff online saying hat it may be a conflicting audio driver. I have both Realtek and Nvidia hd audio drivers but when i try to uninstall them they just reinstall after a prompted restart?
November 1, 2011 3:21:11 AM

Although you have a much better than average PSU, a malfunctioning PSU could cause this.
November 1, 2011 3:52:51 AM

Thanks for the response.
Is there any way that I can determine is the power supply is the issue besides swapping it out with a different one?
November 1, 2011 5:33:30 AM

Faulty mobo or ram is my bet
November 1, 2011 12:59:22 PM

A seasonic gold going bad that's inconceivable! I'd still think you are underfeeding your graphics card. No BSoD can eliminate RAM or driver errors as you should see that pop up. Ask your cousin to borrow his psu to check. I'd be surprised to find a quality psu to be bad out of the box.