Computer freezes when gaming (black screen + loud buzzing)

FooteNasty

Distinguished
May 29, 2008
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18,530
| i5 2500k | Gigabyte 7850 2GB | 8GB G.SKILL DDR3 | GIGABYTE GA-Z68A-D3H-B3 | Samsung F3R 1 TB HDD | Antec 902

So this problem has been going on for awhile. Thought completing a system upgrade I had been planning would do the trick but of course not. I can play games from anywhere from 5-15 minutes before my computer completely locks up. Virtually any game, I've tried them all: BF3, WoW, Far Cry 3, MW3, etc. Black (sometimes green) screen, loud sound coming from the speakers as if it is frozen on a gunshot repeating, and also if you watch the video card it ceasing functioning.

It should be noted that this is the second video card this has happened on, first on an old 5750 and now on my brand new 7850, so I know it's not the cards. I just installed Windows 8 along with a new SSD drive, so in the last 24 hours I have completely wiped my old system, started up good as new again with a new OS, and still this keeps happening. All drivers have been downloaded from the developers for video card, motherboard, etc. The only thing I remotely have to go on is when I view my event history or whatever its called. Being that my OS, HD, and SSD are brand new and fresh, the only critical error listed is from when the game crashed, below:

Log Name: System
Source: Microsoft-Windows-Kernel-Power
Date: 12/10/2012 12:59:31 PM
Event ID: 41
Task Category: (63)
Level: Critical
Keywords: (2)
User: SYSTEM
Computer: Beast
Description:
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="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
<EventID>41</EventID>
<Version>3</Version>
<Level>1</Level>
<Task>63</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000002</Keywords>
<TimeCreated SystemTime="2012-12-10T20:59:31.369240500Z" />
<EventRecordID>1323</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>Beast</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<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">0</Data>
<Data Name="PowerButtonTimestamp">0</Data>
<Data Name="BootAppStatus">0</Data>
</EventData>
</Event>

Sorry this is so long, wanted to cover as much base as possible. Only thing I can think of is maybe my power supply is dying? It's about 3 years old but never been an issue (http://www.newegg.com/Product/Product.aspx?Item=N82E16817151034). Any help is greatly appreciated since I am now officially lost as what to do. Thanks in advance. . .
 
Thanks for including all that info. It sounds like vga drivers to me. Make sure you remove them completely, then reinstall the newest drivers from AMD's site. Make sure the drivers for the integrated cpu video adapter is turned off and as well as shutting off the onboard vga from the BIOS. That's where I would start.