Yeah there was a lot of work put into this at the time and I think it was TheRoDent who suggested the chipset may also be playing a large roll.
Let us know how the BIOS re-flash goes [

]
<b>*** Edit - A matter of Interest ***</b>
Taken from the Intel Website:
Support systems for Hyperthreading:
Chipsets: 845, 848, 850, 852, 865, 875, 915, 925, 7320, 7520.
Operating System Support
Microsoft* Windows* Operating System Based PCs
The following desktop operating systems include optimizations for HT Technology and are currently eligible to carry the new Intelr Pentiumr 4 Processor with HT Technology logo:
Microsoft* Windows* XP Professional Edition
Microsoft* Windows* XP Home Edition
The following operating systems are not recommended for use with Hyper-Threading Technology. If you are using one of the following 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
Linux* Operating System Desktop Based PCs
The following Linux operating systems include optimizations for HT Technology and are currently eligible to carry the Intelr Pentiumr 4 Processor with HT Technology logo:
Red Hat Linux* 9 (Professional and Personal versions)
SuSE Linux* 8.2 (Professional and Personal versions)
Red Flag Linux* Desktop 4.0
COSIX* Linux* 4.0
Note that while other Linux operating systems may have HT Technology enabled, only the distributions above are currently eligible to carry the Intel Pentium 4 Processor with HT Technology logo. If purchasing a PC based on a different Linux operating system, check with your PC vendor to determine if the PC includes the necessary system ingredients for HT Technology and has HT Technology enabled.
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