If you have tried the latest drivers from ati and also the ones from the cd provided with the card ontop of a fresh install of your win7, then you may have a faulty card. How old is the card? and is rma'ing it to the store of purchase an option? I am in Ontario canada and most of the shops i deal with have a 15-30 day direct replacement policy. I have installed alot of these cards in new builds for people over the past few months and i have not incountered this problem. Your specs are more then enough for this card because on most of the budget to midrange gaming rigs i build i only use an E7600 3.06 cpu 4gigs of ddr2 1066 ram and a 450watt ocz fatal1ty series psu with win7 ultimate.