For those of you using ATI cards in a Crossfire setup, AMD/ATI has removed the normal Crossfire profiles from it's driver package recently. They now must be downloaded separately from the driver, and installed separately in order to optimize Crossfire performance in applications.
Those of you thinking that the new driver packages don't perform as well, and are using Crossfire, might want to check out: Drivers & Support | GAME.AMD.COM
And download the profiles. It's under 500K in size.
ATI says it was done so that they can release the profiles more frequently, without having to rework the huge driver package when it isn't necessary.
I couldn't believe the difference in game performance after I installed them. I was thinking that I wasted my money on the second video card. Happily, I was wrong.