TweakTown has posted its coverage of Computex 2005, day 2. They have some benchmarks of ATI's X850XT Crossfire versus NVIDIA's GeForce 6800 Ultra SLI in Doom 3 set to Ultra Quality:
6800 Ultra SLI
|4x AA 8xAF
Overall the X850XT CrossFire seems to be a bit faster in Doom 3, but it's just a marginal difference.
"Day 2 of Computex 2005 was a hive of activity. Not only did we manage to bring you more Crossfire benchmarks, as hinted at in our coverage of Day 1, but we also caught up with more vendors, specifically ASUS, Corsair and GeCube."