That's been fixed a long time ago. In fact multi GPU CrossFire does better than multi GPU SLI.
Here are some Toms' Hardware numbers:
Crysis - High, 4XAA, No AF, 2560 x 1600
HD 4870 - 5.6
HD 4870X2 - 23.1
http://www.tomshardware.com/reviews/radeon-hd-4890,2262-7.html
Crysis - Very High, 4XAA, 8XAF, 2560 x 1600
HD 4870X2 - 17.7
HD 4870X2 CF - 26.6
GTX 280 - 10.6
GTX 280 SLI - 12.8
GTX 280 3- way SLI - 8.8
GTX 295 - 3.6
GTX 295 SLI - 0.1 (failed to run)
http://www.tomshardware.com/reviews/geforce-gtx-295,2123-4.html
The rEVOLution is not being televised







