Originally Posted by alwayssts
I think as soon as 660ti and 660 launch AMD will be on the true defensive, as those parts will assuredly be both clocked and priced competitively with Pitcairn (7800). As soon as that becomes a less viable cash-cow, which really is all they care about at this point, the obvious choice would be to refresh the lineup with a chip clocked to perform better than a stock 680/670 and reap the rewards.
The GTX660 seems to be based on the GK104 GPU:
AFAIK,it was meant to use the GK106 GPU which was predicted to be around the same size as Pitcairn,but there is no sign of this even in mobile products. Only the GK107 and GK104 seem to be around ATM.
The GK104(294MM2) is around 39% larger than Pitcairn(212MM2),meaning AMD can compete fine with the lower end and midrange cards,even if it is on price,especially if performance is a little lower.
Nvidia says that 28NM wafer pricing is very high this generation: