Left 4 Dead

The game runs on the Source engine and has an integrated benchmark, but the latter does not report the bottom speed information.

It is only at the resolution of 2560x1600 that the GeForce GTX 295 duo beats the GeForce GTX 285 trio, but the gap is a mere 2%. The scalability is all right, though. The performance grows almost 60% over the single card, which is quite good for a quad-GPU subsystem. However, it is the quad-GPU solution from AMD that wins the resolutions above 1280x1024 and enjoys a much larger lead over the Radeon HD 4890 despite having lower frequencies.

S.T.A.L.K.E.R.: Clear Sky

To achieve a playable speed in this game we disabled FSAA and such resource-consuming options as Sun rays, Wet surfaces and Volumetric Smoke. We use the Enhanced full dynamic lighting (DX10) mode for our test and additionally enable the DirectX 10.1 mode for the ATI cards.

It is the first time that the GeForce GTX 295 SLI tandem has no rivals. It is ahead of both the trio of GeForce GTX 285 and the duo of Radeon HD 4870 X2. The pursuers are close behind at 2560x1600, yet Nvidia’s quad-GPU monster doesn’t give up its lead. It offers a playable frame rate with some reserve for the most action-heavy scenes.