Here is a table with the results of our tests. We can proceed to the summary diagrams now.
The first two pairs of summary diagrams allow us to compare the efficiency of AMD CrossFireX and Nvidia SLI technologies with respect to Radeon HD 6970 and GeForce GTX 570 graphics cards in all the games and graphics quality modes. First, here are the results without FSAA.
CrossFireX has higher efficiency than SLI in two out of the three semi-synthetic benchmarks, SLI winning in 3DMark Vantage only. AMD’s technology is also more effective in such games as Crysis, Far Cry 2, Aliens vs. Predator (2010), F1 2010 and Tom Clancy’s H.A.W.X. 2 whereas Nvidia’s SLI is better in Resident Evil 5, S.T.A.L.K.E.R., Metro 2033: The Last Refuge and Mafia 2. The two technologies have the same scalability in the rest of the games.
We must admit that turning FSAA on doesn't change the overall picture much:
We can only note that each multi-GPU technology improves its scalability, which might be expected since they are both developed for high loads.
The next two pairs of diagrams do not directly pertain to the subject of this review, but should be interesting nonetheless. The first two compare the speed of the single Radeon HD 6970 relative to the single GeForce GTX 570 which serves as a baseline or 0%.
The summary diagrams of this kind make it easy to see in what games a particular graphics card has an advantage. Here, the Radeon HD 6970 is much slower than the GeForce GTX 570 in Tom Clancy's H.A.W.X. 2, Lost Planet 2 and in the high-quality mode of StarCraft 2: Wings of Liberty. There are games where the Radeon HD 6970 is faster, although its advantage is not that large.
And here is how our Radeon HD 6970 CrossFireX tandem compares to the dual-GPU GeForce GTX 570 SLI configuration:
The two GeForce GTX 570s win in Resident Evil 5, S.T.A.L.K.E.R., Borderlands, Tom Clancy's H.A.W.X. 2, Lost Planet 2, and in the high-quality mode of StarCraft 2: Wings of Liberty. In the rest of the games the chances are the same or the Radeon HD 6970 pair goes ahead.