Find out more about FSAA in Tom's article . At 800x600 they are at the same low level as at 1600x1200. This is not surprising, because the chip must render the scene internally at 1600x1200, and then filter it down to 800x600. The explanation is very simple. Personally, I am not too fond of FSAA in a shooting game like Quake.
Quick reactions are more important here.
In case of Direct3D games it is at least possible to set intermediate steps. Generally, I think that FSAA makes more sense for strategy games. The frame rates are less important and you also look at the scenes longer - most certainly longer than a motivated Quake player, who runs through the rooms with a gun in his hand. At least the 3D Prophet II GTS achieves better results than all other candidates. Overclocking Chip and Memory Click here to find lowest prices on graphics cards.