Test are run under High Quality settings, with AA and AF set through the menu or console command. Remember, Quake 4 uses the Doom 3 engine on top of OpenGL and not Direct3D. Understandably the Radeon X800XL is at a disadvantage here. So, it's quite surprising to see the Radeon X800XL came very close to the GeForce 6800GT - a mere 2 fps difference with AA and AF at 1024 x 768. Again we see too huge a performance hit on the GeForce 6800GT. Since both cards can still provide very playable frame rates at 1024 x 768 with AA and AF, we recommend this setting for best gameplay experience with both cards. However, you don't want to play Quake 4 with AA and AF above 1024 x 768, since minimum frame rates is already at the 30 fps mark on both cards.
Quake 4, Data Processing Terminal, 1024 x
768. 32 bit fps Progress
82.5 fps
55 fps
27.5 fps
0 fps
| GeForce 6800GT |
Radeon X800XL |
|||
| Default | 4x AA 16x AF | Default | 4x AA 16x AF | |
| <30 fps | 0 | 0 | 0 | 5 |
| 30-45 fps | 0 | 19 | 0 | 14 |
| 45-60 fps | 2 | 29 | 6 | 26 |
| 60-90 fps | 21 | 22 | 20 | 21 |
| 90-120 fps | 21 | 1 | 19 | 2 |
It's obvious that the cards are actually evenly matched in this game - both spent their time mostly between 45 to 120 fps - despite the higher average frame rates from the GeForce 6800GT. Even when AA and AF is enabled, they stay pretty close to each other (the X800XL does drop to 29 fps for at least 5 seconds while 6800Gt is slightly better at 31 fps). Looks like higher maximum fps from the GeForce 6800GT is again the culprit here - causing higher average frame rates..
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