Resident Evil 5
The GeForce GTX 570s win this test but, returning to the subject of this review, we can see that in the FSAA-less mode the scalability of the CrossFireX configuration varies from 62% to 74% whereas the scalability of the SLI tandem is 72% to 86%. When we turn FSAA on, the CrossFireX configuration offers higher scalability (83 to 88%) compared to the SLI one (73% to 81%). That’s good, but Nvidia’s solution is still faster.
S.T.A.L.K.E.R.: Call of Pripyat
Nvidia wins in S.T.A.L.K.E.R., too. Despite the performance benefits of the Radeon HD 6970 tandem over the single such card (40% at 1920x1080 and 60% at 2560x1600), the problem with CrossFireX in this game is that the bottom speed, which is the crucial factor for player’s comfort, is too low. Unfortunately, the two Radeon HD 6970s do not run S.T.A.L.K.E.R. as smoothly as the GeForce GTX 570s which is indicated by the difference in their bottom speeds. Nvidia’s multi-GPU solution enjoys a higher increase in average frame rate, too.
Borderlands: The Secret Armory of General Knoxx
Like in the previous test, the CrossFireX tandem does not enjoy a high advantage over the single card in terms of the average frame rate whereas its bottom speed is downright low. On the other hand, the GeForce GTX 570 pair is far from brilliant in this game, too.
Grand Theft Auto IV: Episodes from Liberty City
This game's engine doesn't like multi-GPU technologies much. As you can see, CrossFireX and SLI can only increase the average frame rate by 32 to 57%, which is hardly a strong argument in favor of buying a second card specifically for Grand Theft Auto IV.
Left 4 Dead 2: The Sacrifice
It’s all simple in this game: the heavier the graphics load, the higher the scalability of the multi-GPU technologies. The solutions from AMD and Nvidia are roughly equal to each other in this game but we must admit that Left 4 Dead 2 runs fast even on a single top-end graphics card at 2560x1600 with 8x FSAA.