Considering GCN and Kepler are being fabed on the same 28nm tech, I highly doubt Nvidia could make a card with the same number of transistors that outperforms the 7970 by 50%. If that were the case, AMD needs to fire their entire design team because apparently that means they can not even come close to the per transistor performance they could have had.
It is bogus data, 512 bit bus on GDDR5, and a 1k dual gpu are insane. I expect Kepler to have the 680 only be 5 - 15% faster than 7970 but be priced much more reasonably against it to drive sales (something like $500).
It is bogus data, 512 bit bus on GDDR5, and a 1k dual gpu are insane. I expect Kepler to have the 680 only be 5 - 15% faster than 7970 but be priced much more reasonably against it to drive sales (something like $500).