Performance in Theoretical Tests

Scene Fill Rate

ATI Radeon HD 2900 XT behaves just according to theory: its scene fillrate is a little higher compared to Nvidia GeForce 8800 GTS due to increased clock-speed, however, it cannot compare to the 8800 GTX model, as the latter has 24 render back ends, whereas ATI’s new solution only sports 16 of them. Obviously, the R600 cannot match G80’s capabilities when it comes to Z pixel rate, as it only can compute 32 pixels with Z-value per clock.