It is a hard decision I suppose.
6990 uses less power than the 5970.
How long are the 7k series from around the corner? If it is real soon, even then, it might take a while for the x2 of 7k series to come out?
I thought the 5970s use about 80w or so less power than the 6990s? At least that's how they're listed at the
HW comparison chart. As far as the top tier HD 7K series, I think I remember reading that we won't see it til late 1Q or early 2Q 2012.