OK, I've tried Crysis and Far Cry 2 as well. I'm down by 10 to 20% on Tom's benches when I add the same AA levels except for Clear sky where I had to turn down Sun rays to medium and Sun to medium too, with Depth of Field turned off (I don't like the blurring effect) to get playable frame rates. I'm now using the Catalyst 10.2 hotfix from the Sapphire website. I've swapped the cards round and back again. I also tried the cards individually and didn't have to turn down Sun and Sun Rays in Clear Sky to 25-30 FPS. Is this a problem with the 10.2 Catalyst working in Crossfire?