This one blames video.
- Replace video drivers (uninstall the current one's completely before downloading/installing the fresh copy.
- Check card to ensure the vents aren't clogged, that the fan is working, that the power plug is firmly seated and that that card is firmly seated in it slot (use anti-static precautions when doing this).
Try these free diagnostics: Hardware Diagnostics
In particular, run the video diagnostics - there's 2 places that they're listed in the above page.
If all else fails, then try another video card. If you don't have one, purchase one from a store that will let you return it (for your money back) if the card isn't the problem.
Good luck!
BSOD BUGCHECK SUMMARY
Code:
Loading Dump File [C:\Users\John\_jcgriff2_\dbug\__Kernel__\081812-27877-01.dmp]
Built by: 7601.17835.amd64fre.win7sp1_gdr.120503-2030
Debug session time: Sat Aug 18 00:00:30.451 2012 (UTC - 4:00)
System Uptime: 0 days 0:32:51.575
BugCheck 1000007E, {ffffffffc0000005, fffff88004882fb5, fffff88006f87678, fffff88006f86ed0}
*** WARNING: Unable to verify timestamp for ntoskrnl.exe
*** ERROR: Module load completed but symbols could not be loaded for ntoskrnl.exe
Probably caused by : atikmdag.sys ( atikmdag+9fb5 )
DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT
BUGCHECK_STR: 0x7E
Bugcheck code 1000007E
Arguments ffffffff`c0000005 fffff880`04882fb5 fffff880`06f87678 fffff880`06f86ed0
BiosVersion = F4
BiosReleaseDate = 03/09/2011
SystemManufacturer = Gigabyte Technology Co., Ltd.
SystemProductName = GA-870A-USB3
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии``
*** WARNING: Unable to verify timestamp for ntoskrnl.exe
*** ERROR: Module load completed but symbols could not be loaded for ntoskrnl.exe