I haven't found any information stating that FFXIV is running any better with Dual GPU Video Cards. From all the threads I have read so far on that matter, the 6970 will run FFXIV better even though the 6990 is two 6970 GPU's. The reason is becauses FFXIV will only use 1 GPU from the 6990, causing it to be overworked on that single GPU. I have heard that there is a work around for getting Crossfire to work properly with FFXIV, so a better option would be to Crossfire two 6970's, which by the Benchmarks I've read, will outperform the 6990 anyways. Even a single 6970 would be good enough with the 2gigs of video memory to run on your screens, as I'm sure even Crossfired 6970 wouldn't run FFXIV Max Settings with DOF and AO.