i have a problem with afterburner.. i build this same exact rig as described. but every day about 2-3 times a day my computer frozes and i cant do nothing than restart. still not sure why is this happening, but today i saw that everything is working well . guiminer shows hashing in progress, but pool shows zero.. and when i clicked afterburner icon, computer frozed and was nothing possible to do than just restart.. someone have some idea?? or same problem?