Yes, so binning yields for a given performance target (i.e. 1.31 TF DP) are not good enough to sell them immediately in numbers. Yields affect power consumption. 30% of your chips might run at 1.0V at 800MHz, but 70% don't unless you disable something. (Binning) Yields have everything to do with it. In the case of GF100, they had to, with that else would they have been able compete? GF110 came on a much more mature process than 28nm is now. My point is, that if they can only supply 13 SMX parts in numbers now, most chips cannot reach either their target performance at the target TDP. As Arzachel said, you have to cut them down somehow.