Quote Originally Posted by Solus Corvus
My optimistic view is 40% faster then evergreen with perfect hardware/driver execution. Pessimistic would be a little faster then 295 with some sort of problem that needs a respin, board revision, or several driver versions to fix (it's a complex new arch, don't say it's not possible). Realistically I'd say 30% faster then 5870 with some minor growing pains.
That sounds about right. But keep in mind 40% is Nvidia's number and that puts it right on top of the HD5970 which would pretty much render that part irrelevant (unless you have a hankering for Eyefinity).