Wow. They had the card and tested it on an i7 platform. Why? It makes it extremely hard to compare.
And only two games, of one we know that crossfire does not perform very great. (4870 37 FPS, 4870x2 40.2 FPS)
And guess what?
Crossfire is crippled on Far Cry 2 as well!
Even when using the latest hot fix