Originally Posted by Dismount
has done reviews between the 5xx and 6xxx series of cards. If I remember right, the 69xx series were just beaten by the 5xx cards, but at a much lower price point per card.
Which opens the door to cheaper crossfire.
I've been absolutely thrilled with the performance of my 5870 and my two 5770s in cross.
The Nvidia 580 is $499 while the 6970 is $340-ish (Visiontek) right now. That's a BIG gap in price. The 580's competitor is/was the 5970 Black Edition which was a 2xCPU card but I think the 580 still beat it out but only slightly.