I'll just add my 2 cents here...
I have a Tri-Fire 6970 rig right now, on an ASRock Extreme7 Gen3 motherboard. I've been planning to upgrade to a single PCI 3.0 card at some point as my motherboard has a single PCI 3.0 slot. For my 6970 Tri-Fire setup the motherboard sports an NF200 chip for the PCI 2.0 16/8/8 configuration , but bypasses the NF200 chip when a single card is used. Nice board, I'll upgrade it when the Haswell CPUs come out.
Anyway, looks like I'm waiting for next gen 7990 after all's said and done. I expect it will be the best single card option to drive my 5760 x 1200 Eyefinity Array at the moment. The Tri-Fire 6970's do a nice job of driving this Eyefinity as is, and thinking the dual 7970 GPU card will at least match 3 x 6970. Then when I get a Haswell motherboard/CPU I'll throw a 7970 in the mix and Tri-Fire again
So to summarize, for some of us that have a single PCI 3.0 slot until the next time we upgrade our motherboards, I'll cast the "single PCI 3.0 slot vote" for the king of cards: all hail the 7990!!!
The Titan does get honorable mention, perhaps it'll come out with a dual GPU version soon
I wonder if my Antec HCP 1200 power supply is enough for Tri-Fire 7990 & 7970 LOL Edited by Undermoose - 3/11/13 at 7:07pm