The HT is single core Processor with Hyper-Threading(HT)that gives you A Virtual Duel core, But Runs way Hotter and takes twice as long to process than an Actual Duel core.
Pent 4HT is great for Microsoft office
applacations and Busness and will run games better
than a Plain Pent 4. The Pent 4(D) 3.0Ghz has
actually 2 pent 4 3GHz Microprocessors and will
act as if your running a freight train compaired
to a yard switcher. Twice the Processor twice the
processing in the same time It also reqires the
right matched Chipset Motherboard.
So The Pent D prcessorers are twice as fast as the Pent HT and the pent D processorers double check everything like the Pent HT but with no lag nor lock up problems the HT and other single core procressors ten to have when trying to run the
newer high tech Games comming out like Oblivion it also will support 64 Bit processing and still support 32 bit processing without the need to change settings from one type program to another.
AMD is changing over to the intel Pent D processors because of this and other facts.
I Have 2- 19inch flat screem LCD displays and
just to try it I ran Oblivion on one screen and
guild wars on the other. first time I ever needed
to turn down the settings but for 15 min I had
both games running with no lag.