Download the Omega Drivers:
http://www.omegadrivers.net/
It also installs the Ati Tray Tools, the icon is in the toolbar. Right-click it, then Direct3D/Adaptive Antialiasing/Enable. Leave it at "Performance Mode"! Also enable normal AA, also under Direct3D.
Some games get a major performance hit when you use AAA, like Far Cry when there are a lot of trees.
AAA doesn´t replace AA, it´s an addition.
"Adaptive antialiasing
In modern games, many objects are not realized as 3D objects because this would unnecessarily increase the strain on the graphics card. An example of this is fences or leaves on trees and plants, since their complex structures would require too many polygons to depict accurately. Instead, game designers often take an alternate route and use a special texture (bitmap) to depict these complex structures. Certain areas within the textures are then declared transparent, ensuring a realistic appearance within the game.
Conventional FSAA methods break down when applied to these kinds of objects, since the edges aren't actual object edges but only appear within the larger texture (bitmap). The new adaptive FSAA automatically recognize this type of object, ensuring optimal anti-aliasing quality."
Halflife 2 without AAA:
http://www.de.tomshardware.com/graph...nohqaf-big.jpg
With AAA:
http://www.de.tomshardware.com/graph...aahqaf-big.jpg