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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.

Using the Source engine, the game has modest system requirements and every tested card ensures a comfortable speed at resolutions up to 2560x1600 inclusive. The single GeForce GTX 280 is the only card to fall behind. Note that the pre-overclocked frequencies of the GeForce GTX 295+ help it overtake the GeForce GTX 280 SLI tandem.

The results are more interesting when we use high-quality antialiasing modes: ATI’s solutions lose their ground here while the GeForce GTX 295 falls behind the GeForce GTX 280 SLI at 2650x1600 because of the smaller amount of graphics memory available to 3D applications (895 against 1024 megabytes). The difference in image quality is even less conspicuous than in the previous games because Left 4 Dead is a survival shooter with lots of dark scenes.

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 enabled the DirectX 10.1 mode for the ATI cards.

Thanks to our relaxed settings every graphics solution, except for the single GeForce GTX 280, copes with this test successfully. Nvidia’s cards boast higher minimum frame rates at resolutions up to 1920x1200 inclusive but ATI’s cards are ahead in this parameter at 2560x1600 where the 3-way Radeon HD 4870 CrossFireX configuration is over 25% faster than its opponents.

 
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