RV770: ATI Radeon HD 4850 & 4870 analysis

Anti-aliasing Performance

The re-jigged render backends in RV770 work absolute wonders when it comes to anti-aliasing performance - the Radeon HD 4870 X2 barely blinks at even 8xAA, while the Radeon HD 4870 shows less of a performance drop than the GeForce GTX 280. Even the Radeon HD 4850's anti-aliasing performance scaling is arguably better than the GeForce GTX 280's, as it suffers less of a hit as you move from 2xAA to 4xAA and from 4xAA to 8xAA.


With this particular test, we've looked a lot deeper into AA performance, testing all of the possible settings available. Some of the custom filter AA modes look usable on the 4870 especially and I'm sure at lower resolutions they'd be very usable in games like Episode Two on the Radeon HD 4850 as well.