Originally posted by Colossus
I had read somewhere that there is a standard that card manufactures need to follow in creating a GPU for support of AA and AF. There are quite a few ways to supply antialiasing. Some use Multisampling or Superscaling. Depending on which approach a card manufacturer implements in the drivers/hardware determines the clarity of an image and speed.
There are specific methods of AA, but there is no standard for how the hardware manufacturers implement them. Even if both cards use super sampling as their AA method, repeated reviews have shown that the quality of the end AA image, and the performance hit associated with it can vary from chip to chip.