Intel Corp (INTC)

[kpf]

It also clearly shows the Penryn core is nothing like the Silverthorne one.

It is pretty clear optimizing for a single-core die results in a different layout than optimizing for a dual-core-die with shared cache. E.g there are functional units you don't need for the former, so the same layout would leave unused space. Beyond, there is circuitry in Penryn for future deployment which you don't need in Silverthorne because it is not intended for deployment in its future revisions. Beyond, Silverthorne might have products for its lower-feature-yields in mind which suggest layout-changes to allow these to be fused out reasonably. And many more things to consider. However reaarranging functional blocks and µarch-changes are different pairs of shoes.

K.