If the game runs without full-screen anti-aliasing, CrossFire platform performs slower than a single RADEON X850 XT. You can feel the advantages of the multi-GPU mode only if you play at resolutions of 1024x768 and up with enabled FSAA. In this case RADEON X850 XT CrossFire is only 5fps behind GeForce 7800 GTX SLI.
In the Research level there is completely different gaming environment: the action mostly takes place indoors. RADEON X850 XT CrossFire is initially just a little bit slower than GeForce 7800 GTX, however once we switch to eye candy mode, it finally manages to get at the head of the race. The absence of Shader Model 3.0 support doesn’t allow ATI platform to defeat GeForce 6800 Ultra SLI, although it gets as close to the rival as 2fps difference in 1600x1200.