Hyperthreading only shows 1 Processor

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why me

I just installed a P4 2.8Ghz HT chip in my computer. It
will only show one processor. How do I tell Windows that
there is a Hyperthreding chip in there? How can I tell if
it is working correctly?
 
why me said:
I just installed a P4 2.8Ghz HT chip in my computer. It
will only show one processor. How do I tell Windows that
there is a Hyperthreding chip in there? How can I tell if
it is working correctly?
Click to expand...
=============================================================
Does your motherboard support HT? If so, HT has to be enabled through the
bios.

Curt.
 
Yes it supports HT it is a ASUS P4P800-VM. HT is enabled
in the bios. I have updated the bios to the most recent
version. I am running windows XP Pro. Windows should
detect it but it does not.
 
Have you checked on the processor to make sure it's the right model? .... I just installed a P4 2.8 (intel retail boxed processor 800Mhz FSB HT - be aware there is another 2.8 with a 533FSB and no hyperthreading) on an ASUS P4C800 (different chipset from your board) with dual low latency 521k DDR. Without any input from me it set itself up and shows two processors in device manager and two cpu usage graphs in task manager. Bad news is that unless I overclock it (really easy in the Bios on this board - it's stable at +10% and at +20% with no USB devices connected - that's about 3.2GHz and my stuff really does run nearly 20% faster) it is only very fractionally (2%) quicker than my old AMD XP2400+ with slow memory and a very ordinary motherboard (L7VTA), that's running cpu intensive chess analysis software.
 
Does this mean that if I have a single Pentium IV with HT that I will
need XP Professional to support it? I understand that XP Home does not
support multiprocessors.
 
Willie

apologies for jumping in here...

While XP Home does *not* support physically separate processors, it does
support hyper-threading which creates 2 logical (or virtual) processors
which share the workload. These will then appear as two identical
processors in XP despite only one physical processor being present.

XP Pro supports 2 physically separate processors and hyper-threading.

hope that helps
Pete
---------------------------
 
It is definately the correct model, full retail 800Mhz FSB
-----Original Message-----
Have you checked on the processor to make sure it's the
Click to expand...
right model? .... I just installed a P4 2.8 (intel retail
boxed processor 800Mhz FSB HT - be aware there is another
2.8 with a 533FSB and no hyperthreading) on an ASUS P4C800
(different chipset from your board) with dual low latency
521k DDR. Without any input from me it set itself up and
shows two processors in device manager and two cpu usage
graphs in task manager. Bad news is that unless I
overclock it (really easy in the Bios on this board - it's
stable at +10% and at +20% with no USB devices connected -
that's about 3.2GHz and my stuff really does run nearly
20% faster) it is only very fractionally (2%) quicker than
my old AMD XP2400+ with slow memory and a very ordinary
motherboard (L7VTA), that's running cpu intensive chess
analysis software.
 
That's a relief! I have XP Home and am upgrading next week to a P4P800
system with Pentium IV 3.0Mhz with HT.

Thanks.
 
I did a repair from the cd and that has not worked. had
to reload a bunch of stuff though. Ran into the
rasman "25,26" SP1 problem. had to fix that. But still
only one processor shows.

I Also tried swaping halmacpi.dll with hal.dll and
swapping ntkrnlmp.exe with ntoskrnl.exe and renaming them
respectivley as a post recomened but that did not work for
me, hence needing to do the repair from the CD.

I will try to do an upgrade from inside XP latter on.

If I have not stated I am running a ASUS P4P800-VM, 1G
RAM, 2.8Ghz P4 with HTT, And XP pro "upgrade"
 
A repair install ought to do it. However, you might get some benefit from:

http://support.microsoft.com/default.aspx?scid=kb;en-us;299340&Product=winxp

"How to Force a Hardware Abstraction Layer During an Upgrade or New
Installation of Windows XP"

and:

http://support.microsoft.com/default.aspx?scid=kb;en-us;298898&Product=winxp

"How to Determine the Hardware Abstraction Layer (HAL) That Is Used in
Windows XP"

The HAL that you need is the one for "ACPI Multiprocessor PC", even if
you're running XP Home (like me).

Asus claims that you P4P800-VM (865G chipset) will support HT. My P4P800
(865PE chipset) certainly does, and shows two CPUs in Device Manager.

Good luck.

Address altered to avoid spam. Replace nkbob with bobkn.
 
Why Me? said:
Yes it supports HT it is a ASUS P4P800-VM. HT is enabled
in the bios. I have updated the bios to the most recent
version. I am running windows XP Pro. Windows should
detect it but it does not.
Click to expand...
=========================================================
For what its worth, I'm running XP Home with P4 2.4's on different boards,
(an Intel 865PERL and an ASUS P4P800 Deluxe). Dual processors are listed in
device and task managers on both systems. On initial installs on both
boards, making sure HT was enabled, everything flowed from there. You may
have to do a repair install of XP to solve things.

Curt.
 
You are a genius, no really you're a genius.
The force HAL thing worked like a charm.

Reinstalling by repair option and upgrade did not do the
trick,
but the HAL thing works. Here is a summary for lazy
people.
FYI - ACPI= Advanced Configuration and Power Interface

1. Make sure all your ACPI thingies in your BIOS are
enabled
(probably are by default)
2. Load windows or do an upgrade (recommended)
3. Wait till the text screen at the start that says press
F6....
4. press F5 instead
5. select your type of configuration.
-->I presumed my PC was to use the "ACPI Multiprocessor PC
option". I think most PC's with HT will use this?
Note: only two choices will be visible, use your
arrow keys to scroll up and down.

I have ran msinfo32.exe and (systeminfo.exe (from a dos
window)) and they report two processors now, so I presume
it is working.

Oh did I mention Bob is a Genius?

Thank ya, Thank ya very much.... Elvis has left the
building...
 
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