hi all, so i'm trying to play saints row the third which i have purchased through steam, i'm running windows 7, intel core i5 3570k, and have a saphire radeon hd ghz edition oc 7870. with that said, when i get to the first mission where you have to bust into the army base i get up into the helicoptor part and after i finish that area it loads to a black screen at which time the card revs to %100 and i get locked out, cntrl+alt+delete doesn't work nor does reset i am forced to power off from the tower. any ideas what this could be? my other games work fine and tax my card far more than this does (witcher 2, metro 2033).