i have found that these random and unrelated BSOD have to do with a item not seated properly, I would reseat your video card mem and make sure all conecctions are tight,
also please put up the model number of your ram, this does not apply all the time but once in a while it does
http://usa.asus.com/Motherboards/AMD...5A78LM_LX/#MSL
infact post all the model numbers for everything you have on the PC