Quote Originally Posted by tajoh111 View Post
10-15% maybe to a gtx 480 and even then it still probably in a best case scenario is 20%

http://www.anandtech.com/show/4008/n...rce-gtx-580/15

This is the very best the 6870 does against the gtx 480 and this situation is particularly CPU limited because it is an old game(e.g SLI 580 performs more or less the same as a gtx 580). Most of the time it is closer to 50%. In 3 out of the 10 games in anandtech's review, it was 70%(battleforge, hawx and dirt 2).

When the 6870 is losing to the gtx 580 in a game that loves AMD cards like battlefield bad company 2 by 48%, 30-50% doesn't look too good.
580 is 40% faster in that game..

Anyway, so much mindless arguing.. it's been pretty clear Cayman XT is going to be around GTX580 performance for some time. be it + or - a few % come review time doesn't really matter.. AMDs own slides ahve positioned it Faster than a 480, Slower than a 5970.. do the maths !

To me, it's going to come down to power consumption, OCing, and price

I do think single card Eyefinity might sway people. The counter argument a single card isn't powerful enough for EF won't really hold for some time.. (till games pull it to its knees)