Bulldoze that Sandy Bridge

[RaV666]

2009 and 45nm, when AMD stopped using the same sockets and CPU's for both server and desktop. There was a lot of internal confusion from 2003 and 2008 regarding server team vs desktop team IIRC and nobody really knew what was going on.
Recently, you will notice that except for the few Suzuka based chips, no Opteron chips are an AM2+/AM3 package.

Shanghai and barcelona seems to share same core too, RB-C2.So the more prominent differentation is on the hexacores like blazer said.
Packaging does not guarantee a different die, as zir blazer explained.

...

Last time that I checked, AMD seems to be producing three different Hexacore dies, the Rev. HY-D0 for Socket F Istanbuls, the Rev. HY-D1 for Lisbons and Magny Cours, and the Rev. PH-E0 for Thubans. Without very specific data is pretty much impossible to know puntual differences, though it would be interesing just for the record.

I agree with you blazer, AMD shares most of the cores until hex core`s came along.
But it still doesnt mean valencia and zambezi wont be same dies again.