nster what video card would you recommend if I don't have a budget at all 
Also thinking what card would be best if this goes bust, though I'm hoping it won't etc. ?
Also thinking what card would be best if this goes bust, though I'm hoping it won't etc. ?
no budget = unlimited funds or 0 funds?
unlimited, the 6990 of course, 0 funds, whatever you have of course
If you game etc, I find the 6950 1GB to be the best value, if only mining, it is hard to say.... 4* 5970 or 4* 6990 would be best on a single motherboard cost effective-wise... Used 5970 @ 400$ each would be phenomenal value. But with such high difficulty, idk if buying a rig only for mining is the smartest idea