OK so if you can theoretically calculate what kind of staggering load would require 8 GB of video ram, could you then correlate that with a theoretical GPU computing load?
What I mean, is that if you could ever use all 8 GB of video ram, would that correspond to using something like 5 of these in crossfire - meaning it's just impossible to ever need that much video ram?
I mean, I know for the 7850 video card, you'd choose the 2 GB version to be better equipped for crossfiring 2 cards and using all that ram. But for 8 GB, you can't crossfire enough of these 290X cards to ever use all that video ram right?
Seems you'd just hit the wall as far as GPU horsepower, being GPU bottlenecked long before you'd ever use all that 8 GB.