they both share the Intel 64 64-bit technology, but the Pentium D does not include Hyper-Threading. The Pentium D's two execution cores provide two completely parallel processing streams.

Intel's top Pentium chip, introduced in late 2000. The successor to the Pentium III, the Pentium 4 features the NetBurst micro-architecture (see NetBurst). All Pentium 4 chips are single core ...