Running ATI 5970 & 5870 Tri-Fire and have just got AA to work in game using ATI's 10.9 drivers (10.10 were pants anyhoo).
In CCC
3D tab
AA = 8 x
AA mode = adaptive multisample
AF = aplication controlled
AI = advanced
In game
Options - graphics = Extreme settings but Switched off Screenspace AA and HDR
God what a difference, gameworlds beautiful.
Oh, and turn of V-sysnc, some screen tearing but the game world moves a damn site quicker.
Just when I thought it couldn't get any better, it did.
This worked for me, thank you knight Flyer.
