Elmer: Re: At 193mm2 there would be about 120 whole die on a wafer.
Where are you getting 193mm^2? I have not seen a die size for A64 published yet, and it seems that you are assuming that A64 will be the same size as Opteron. That is not a fair assumption.
Edit: Maybe someone else knows the answer to this. Elmer has me on ignore.