Far Cry 2
The SLI tandem is a mere 10 fps faster than the GeForce GTX 470 at 1600x900, which can hardly matter considering their frame rates of 90-100 fps. You just can't feel the difference. At the higher resolutions the GeForce GTS 450 SLI falls behind the single-chip GeForce GTX 470 in terms of bottom speed. So, the single argument in favor of the SLI tandem is its somewhat lower price.
This game is tested without multisampling antialiasing as it worsens the textures and provokes a performance hit.
The SLI configuration has the lowest bottom speed among the tested solutions, being even inferior to the single GeForce GTS 450 in this respect. So we can see that multi-GPU technologies have not yet got rid of all their problems. But perhaps some of the problems are due to their very architecture and cannot be eliminated.
S.T.A.L.K.E.R.: Call of Pripyat
We enable DirectX 10.1 and 11 modes for graphics cards that support them.
The GeForce GTS 450 SLI is competitive to the GeForce GTX 470 but has a lower bottom speed at high resolutions, e.g. at 1920x1080. This cannot be justified by the price difference.