As far as I have been able to discover, Win2K Server and Win2K Advanced Server support Hyper-Threading, but only with a customized Hardware Abstraction Layer, the latest BIOS, and Service Pack 4. Interesting enough, Hyper-Threading has to be disabled in the BIOS while the Service Pack is installed, and then re-enabled afterwards.
Adding Service Pack 4 to Win2K Professional doesn't change the fact that the operating system still doesn't appear to support Hyper-Threading.
Quote from Intel website:
<i>"Note: Information on Hyper-Threading Technology † for Intel® Xeon™ processors is available here.
Microsoft* Windows* Operating System Desktop Based PCs
The following desktop operating systems include optimizations for HT Technology and are currently eligible to carry the new Intel® Pentium® 4 Processor with HT Technology logo:
Microsoft* Windows* XP Professional Edition
Microsoft* Windows* XP Home Edition
The following desktop operating systems are not recommended for use with Hyper-Threading Technology. If you are using one of the following desktop operating systems, it is advised that you should disable Hyper-Threading Technology in the system BIOS Setup program:
Microsoft Windows 2000 (all versions)
Microsoft Windows NT* 4.0
Microsoft Windows Me
Microsoft Windows 98
Microsoft Windows 98 SE"</i>
Links:
<A HREF="http://www.intel.com/support/chipsets/inf/ht.htm" target="_new">Intel® Chipset Software Installation Utility
Requirements to Support Hyper-Threading Technology †</A>
<A HREF="http://www.theinquirer.net/?article=5608" target="_new">Both versions of XP support Hyperthreading</A>
<A HREF="http://www.guygraphics.com/index2.html" target="_new">Hyper-Threading Technology - Intro</A>
And you'll definitely want to look at this page:
<A HREF="http://dipswitch.com/xeon.htm" target="_new">What exactly is HT?</A>
WinXP requires Service Pack 1 to enable Hyper-Threading.
Fortunately, this is really not an actual problem. There are only a few multi-threaded applications world-wide that support Hyper-Threading (at the moment), so whether or not Hyper-Threading is enabled is only a minor issue if you install one of them.
<A HREF="http://www.geocities.com/a_noms/SMPgamelist.html" target="_new">SMP Game List</A>
<A HREF="http://www.denniskarlsson.com/smp/" target="_new">List of multi-threaded applications</A>
Toey
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