Since at least 2 months I have a problem with BSOD under windows 7 32-but ultimate.
2 x Gigabyte ATI Radeon HD6990
Motherboard Gigabyte GA-P35-DS3P
Processor Intel Core 2 Duo E6550 2,33GHz/1333MHz
DDR2 2GB PC800
Chieftec BPS-1200C 1200W
Graphic cards are used at 99% for oclhashcat calculations and BSOD happen every 10-14 days.
I've already tested hdd and memory. There was a logical error on hdd detected today, but now it is solved. Anyway I also took memory module from another PC (works well non-stop since few months) and we will see if it helps.
Please kindly take a look on attached files. http://www.bestgsm.com/BSOD.zip