Originally posted by: Astrallite
The real question is, what is SLI 280 not doing for you right now.
haha! yes, my first thought too.
It would stack up average probably....
gtx280 sli = 100%
hd5850 cf = 125%
hd5870 cf = 145%
Unless you're at 1920 8xaa or 2560 8xaa, then those percentages would increase in favor of the ati cards, since they handle high res and high AA so well.