This video isn't interesting because they're using the SR-2 mainboard, but mainly because it's a head-to-head comparison of 4-Way SLI and Crossfire-X. You can clearly see that both architectures provide less performance in one area and more performance in another area. Must see!
Clash of the Titans 5.
Running the 3D Mark Vantage Benchmark on the SR-2 Motherboard, using 4 way CrossfireX and 4-Way SLi for comparison.