Alright so I started looking through Anandtech's review of the AMD 6990 and it looks like under load it consumes 491 watts (Stock config) vs 564 watts for a 6970. So that's like 13~% more power consumed by a 6970 crossfire versus 6990.
If we use the same ratio with the GTX 590 it's going to come to about 539~ watts load power consumption for a GTX 590 if they use slightly lower clocked cores. That's actually not that bad considering the AMD 6990 consumes 491 watts at load, we are looking at a difference of 40 watts so I think it's doable for nVidia.
The price is definitely going to make or break this card.
If we use the same ratio with the GTX 590 it's going to come to about 539~ watts load power consumption for a GTX 590 if they use slightly lower clocked cores. That's actually not that bad considering the AMD 6990 consumes 491 watts at load, we are looking at a difference of 40 watts so I think it's doable for nVidia.
The price is definitely going to make or break this card.

