The GeForce 7950 quad-SLI platform provides a performance gain in the resolution of 1920x1200 pixels, but it cannot reach the 100fps mark as the Radeon X1950 XTX CrossFire does.
As opposed to Call of Duty, the Quad-SLI doesn’t win the SLI AA 8x/Super AA 8x mode in Far Cry. It is even a little slower than the Radeon X1950 XTX CrossFire here.
Although Far Cry is not a hard trial for modern graphics cards, especially working in multi-GPU mode, it is arguable if you can enable SLI AA 16x mode on the quad-SLI system in 1920x1200. The reserve of speed is on the brink of comfortable even in 1600x1200. The Radeon X1950 XTX CrossFire is free from such problems, ensuring a frame rate of 80fps even in 1920x1200.