By the way, you don’t necessarily need a brand-new PIV motherboard to get hyperthreading capabilities.
The 845E chipset supports hyperthreading.
If you’d like to see a list of 845E motherboards that support hyperthreading now, just go here.
Starting with the B-1 stepping, the 845G chipset also supports it.
If you’d like to see a list of 845G motherboards that support hyperthreading now, just go here.
There seems to be something wrong with the Intel website; if you click on one of the motherboard list links, it keeps giving you the same list of chipsets even though the URL is different. If you need to see both, and this happens to you, just go back to search, click the chipset you want to see, click “Integrated Features,” check “HT Technology” and click the “OK” on the upper right hand corner of the window.
If your motherboard isn’t on these lists, don’t fret yet. The Asus boards got hyperthreading enabled through a BIOS change, and presumably many if not most other 845E/G boards will get the same kind of change.