Westmere 32nm (6Cores 12T)*2

[Hornet331]

^
fabricated, since clarkdale has a PCIE controller on die and no external QPI link, but a DMI link. Gulftown needs at least one QPI link to communicate with the X58 northbridge or 2 for the DP version.

Though that doesn't mean that it couldn't be 3 dies, but it makes no sense. Since nehalem is modular and westmere ist just a shirnk they can add and remove cores as they like and make it all happen on one die.

Next rumor will be, that Beckton is only 2 Gainstown dies.