Is There a Hyperthreading Expert in the House?

[Si]

I recently installed a new processor without reinstalling the OS and have
run into the following problem. If I enable Hyperthreading in the BIOS my PC
will reboot after about 30 minutes if left idle and almost immediately if
put under stress. If I disable hyperthreading my PC runs fine. Would I have
to reinstall the OS to get it to work properly or is there a way around the
problem?

FYI, temps are good, air flow is good, drivers, Windows updates and BIOS are
bang up to date.

Cheers.

Si
Windows XP Pro SP2
Pentium 4 3.0MHz 800FSB (Prescott)
Gigabyte 8KNXP (Rev 2) Motherboard
1 GB Corsair PC3200 Ram (Dual Channel)
XFX GeForce 6800GT 256 MB
40GB WD Hard Drive 7200rpm (C Drive)
120GB WD Hard Drive 7200rpm (D Drive)
120GB WD Hard Drive 7200rpm (E Drive)
120GB WD Hard Drive 7200rpm (F Drive)
LiteOn 52x24x52 CD-ReWriter
DVD-Rom
SB Audigy 2
Zalman 400W PSU

 

[DaveW]

It sounds like your CPU is overheating when Hyperthreading is enabled and is
causing the reboot. For what it's worth my P4 3.06 GHz Northwood does the
same thing under load when Hyperthreading is enabled so I gave up and
disabled Hyperthreading and now it runs fine. (And I have a LOT of cooling
in the case.)

 

[Dixon Butz]

Top posting corrected.

It sounds like your CPU is overheating when Hyperthreading is enabled and is
causing the reboot. For what it's worth my P4 3.06 GHz Northwood does the
same thing under load when Hyperthreading is enabled so I gave up and
disabled Hyperthreading and now it runs fine. (And I have a LOT of cooling
in the case.)
DaveW

Nope. It sound like you (DaveW) doesn't know what you are doing.

You must install XP with HT enabled. You can't turn it on if you
installed XP with it off. Or, a non HT processor. You may be able to
do a repair install. I am not sure about that. You could ask in
microsoft.public.windowsxp.general
db