It’s only in the resolution of 1920x1200 pixels that the GeForce 7950 quad-SLI enjoys a considerable lead over its opponents. In the lower resolutions the speed gain is a mere 3-5fps. The Radeon X1950 XTX CrossFire is but very little behind the quad-SLI platform but gives you a better anisotropic filtering.
The multi-GPU systems both allow to play in every resolution, including 1920x1200, in SLI AA8x/Super AA 8x mode, but the GeForce 7950 quad-SLI boasts a bigger reserve of speed. It is everywhere ahead of its competitor by 10-20%.
The GeForce 7950 quad-SLI platform cannot satisfy a demanding user in SLI AA 16X/Super AA 14x mode because its average speed is below 60fps even in 1280x1024. The Radeon X1950 XTX CrossFire offers a higher frame rate even in 1600x1200.
Serious Sam 2
Nvidia’s solutions aren’t superior in Serious Sam 2 anymore. The new Radeon X1950 XTX CrossFire tandem wins every resolution and its average speed is high enough for practical use even in 1920x1200. The GeForce 7950 quad-SLI system does worse here, being limited to 1600x1200 resolution. You can note that the efficiency of Nvidia’s quad-SLI solution is low, like in a majority of previous tests.
The Radeon X1950 XTX CrossFire allows playing this game comfortably in 1280x1024 with enabled 8x Super AA. In other cases the performance is too low for you to be able to use the 8x SLI AA or 8x Super AA settings in practice.