depends on game and which card in-particular...
in a general sense, your wrong..
I understand you have the HD 7970 but that can be interpreted as you standing up for your hardware you have.
also a sign of biased opinions..
I understand you like nVidia, but that can be interpreted as you standing up for your hardware you have, and that is also a sign of biased opinions.
Look if you are going to do the usual posting of photos from benchmarks, that is fine, but don't lie about it. If it isn't done off of new Catalyst drivers and you refuse to take those into consideration, then anything you try to use that I go look at and see "Catalyst 12.4" or anything other than latest drivers won't matter.
The point I hope was taken away from those Palit Jetstream benchmarks is that the extra Vram never made a difference in those benchmarks. The only difference in performance was the fact that the Jetstream was factory overclocked.
All this talk about needing 3Gb's or more for high resolutions is mostly just talk. I suppose if you turn up the AA enough, it might matter on rare occasions.
I have the windforce 670 and I and running 3x 1920x1080 I can run BF3 on all High didn't try ultra but high is buttery smooth. if looking for only ultra then ya sli no single card will do it. If High is good then get the 670 I am playing BF3/High Dirt 3/Max Wings of Prey/Max Need fo Speed Shift 2/Max all on 3 1080 screens big jump from my 1920x1200 Apple Cinema screen and nothing but BF3 has made me turn anything down.