I have a 2 month old Dell 4550 with a 2.53GHz P4 533fsb.

Bios is A05.  I think I read somewhere the Dell Bios A05 supports HT.  However when looking in the bios, I see nothing where you can enable HT.  So you need a bios that will support HT?   I see where Dell has released bios A06.  Does it support HT?

Next do you need a P4 that is specifically HT enabled or will any P4 be HT enhanced with the proper bios?  I see where you can buy mainstream P4 like the 2.4, 2.66, 2.80 that are HT enabled.  No mention of the 2.53GHz. 

Thanks

Dale