This first Intel dual core processor is essentially two Prescott dies grafted together. Each core has its own, separate 1 MB L2 cache, while the two cores share an interface to the front side bus. Intel will offer two product lines, the Pentium Extreme Edition and the Pentium D. The former has HyperThreading capability, giving it four logical cores, while the latter does not. The Extreme Edition is available initially at 3.2 GHz only, while the Pentium D will be available in speed grades from 2.8 GHz to 3.2 GHz initially.



Link: Hardwareanalysis