Hello! This (like my last problem) seems like it will be fun. You all helped me so much last time, so here goes!

Computer
MSI 870A-G54 motherboard
AMD Phenom II x4 Processor
2 sticks of 8g RAM (16g total)
Radeon HD 5670 Video Card
Corsair GS600 PSU

Windows 7 Ultimate

The Problem

My computer will randomly restart, SOMETIMES while I am working on it but mostly while I am away. I live alone so no one could be restarting it. This causes problems because sometimes I leave things open (like browser pages, or text files). I have not recently added any hardware, or changed any programs. Also restarts in Safe Mode.

What I have done

-Ran Memtest86+, no errors
-Checked and monitored temps, all is good
-Did the regular cleaning out of the case and computer (blew out dust, reseated video card and RAM)
-Ran Blue SCREEN Viewer (dump below) This is the only dump file created, although there are many System Events in my Event Viewer that say *The system has rebooted without cleanly SHUTTING down FIRST. This error could be CAUSED if the system stopped responding, crashed, or lost power unexpectedly*


==================================================
Dump File         : 040312-42759-01.dmp
Crash Time        : 4/3/2012 11:52:00 PM
Bug Check String  :
Bug Check Code    : 0x00000116
Parameter 1       : fffffa80`0a5f9430
Parameter 2       : fffff880`03eab9e0
Parameter 3       : 00000000`00000000
Parameter 4       : 00000000`0000000d
Caused By Driver  : dxgkrnl.sys
Caused By Address : dxgkrnl.sys+5d000
File Description  :
Product Name      :
Company           :
File Version      :
Processor         : x64
Crash Address     : ntoskrnl.exe+80640
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\040312-42759-01.dmp
Processors Count  : 4
Major Version     : 15
Minor Version     : 7601
Dump File Size    : 343,872
==================================================



I have heard that this may be related to DirectX and video card drivers, so I rolled them back (still restarts randomly) and made sure they were properly updated (still restarts)

Thank you for any and all help.
...If it restarts in Safe Mode even with the default Windows drivers... I'm almost 100% positive its a hardware problem, especially judging from the fact that your graphics card won't even run properly at stock clocks from your previous problem.

I strongly suggest that at this point you get any old graphics card, pop it into your PC and see if the problem resolves...
Just get one of these old PCI graphics cards off eBay:
http://www.ebay.com/itm/Nvidia-GeForce-32MB-3D-GRAPHICS-PCI-VIDEO-CARD-/330712983151?pt=PCC_Video_TV_Cards&hash=item4d0007a66f#ht_1182wt_1139
Total cost ($12 = 983 Yen)
and keep it in case you need to do any further troubleshooting in the future, since you don't have onboard graphics.Thank you so much Transfusion, I will try that. I am waiting on a new graphics card anyways, will retest and see if it fixes the problem.