I just booted up GTA IV and I have a couple of problems. First of all I can't change the graphics settings. I found a workround by creating a shortcut to the game with some commands in it and I am able to start up the game and change the settings but once I do, it runs at about 20 fps. I'm looking at my GPU usage and they are both working at around 40%. My CPU isn't bottlenecking me so I don't know what it is. I know GTA IV is poorly optimised but before I went crossfire, I was running at full GPU usage at fairly reasonable fps. This is stupid. Other games work fine. Any ideas?