Frame-buffer is overrated when it comes to the ATI lineup.
Originally Posted by hardocp
In the screenshots below we have Qarl’s Texture Pack III installed which is a mod for Oblivion which installs very high resolution textures in the game. This means it will eat up even more RAM on our video cards, yet, watch as the Radeon HD 4870 X2 CrossFireX eats it up and chews it out like it was nothing...
Now check these out, up to 60 FPS at 2560x1600 with 24X CF ADAA enabled and the Texture Pack installed, just flat out impressive...
We all know AA was broken with the Radeon HD 3000 series. Well, it is broken no more, AMD has fixed AA performance well, and not only that, but they’ve offered up a new mode which doesn’t even tax memory bandwidth at all called Custom Filtering AA.
With the enormous shader power present with Radeon HD 4870 X2 and CrossFireX we were more than able to utilize 12X and 24X CFAA modes in Age of Conan. Also, as we saw, we could easily run with these modes in older games like Oblivion and Call of Duty 4. Who would have thought we’d ever be seeing Oblivion at 2560x1600 with 24X AA? This means you can load up old games and set crazy high AA settings. AMD deserves huge kudos for really kicking AA up a notch. They have made high levels of AA playable at high resolutions. We are talking about free 8X AA at 1920x1200 with the Radeon HD 4870 X2
At 1920x1200 we were playing Age of Conan at the highest settings possible on the ATI hardware, 24X CFAA plus Adaptive AA with the highest in-game settings. At 2560x1600 we were able to turn on 8X AA plus Adaptive AA as well, providing better image quality than GTX 280 SLI.
Originally Posted by techreport
The Radeon HD 4870 outperforms even the mighty GeForce GTX 280 with 8X multisampling...
If you like running AA, then you should like the 4870 or 4870x2. Frame-buffer be damned--it is just not as important if you can use other means to implement AA with.