Can you describe the problem with other games? Take crysis for instance. The AA issue with GTA IV is well known.
About the 2 4850's dying on you, I suspect they might have overheated to death. can you enable ATI overdrive in CCC and tell us your GPU/Memory temps? Also your system temps using Everest.
About the 2 4850's dying on you, I suspect they might have overheated to death. can you enable ATI overdrive in CCC and tell us your GPU/Memory temps? Also your system temps using Everest.