Difference between Pentium D and core 2 duo?

A P4 processor is fast, but the Pentium D is much faster. The D stands for Dual Core. This means that they have two on die processor cores instead of just one, as the Pentium 4 does. Two processors also makes it better for "demanding" applications.

The Pentium D is better if you have a motherboard that will utilize the technology. As stated the Pentium D is Duel core. This is Intel's way of creating the closest environment of a true duel processor. The HT is for Hyper-Threading which acts like a zipper and allows several applications to process at the same time. The Pentium D will really make a difference when used with the new 64 bit operating system.

However, HT (Hyper-threading) P4, does have emulated Dual Core processing. In short, the processor makes the computer think its runing a dual core. The Pentium 4 also has a couple different levels, so if you are trying to make a comparison, make sure that you look carefully.

Although neither can match the power of an Athalon or an AMD x2 processor. If you are buying, get something with 64 bit processing. WAY faster and better for games and high graphic systems.