HYPERTHREADING

[Joe Murphy]

I can't get XP to recognize HYPERTHREADING. The bios has hyperthreading
enabled and, at bootup, HYPERTHREADING is recognized. I have done repair
install of XP and loaded SP2. Is a clean install required (UG!)?
joe

 

[Yves Leclerc]

So, do you have two processors listed in Device Manager or not?

 

[Carey Frisch [MVP]]

Windows XP and Hyper-Threading
http://support.microsoft.com/default.aspx?scid=kb;en-us;810231

--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User
Microsoft Newsgroups

Be Smart! Protect Your PC!
http://www.microsoft.com/athome/security/protect/default.mspx

------------------------------------------------------------------------------

:

| I can't get XP to recognize HYPERTHREADING. The bios has hyperthreading
| enabled and, at bootup, HYPERTHREADING is recognized. I have done repair
| install of XP and loaded SP2. Is a clean install required (UG!)?
| joe

 

[Joe Murphy]

I thought I made that clear, the answer is no-

So, do you have two processors listed in Device Manager or not?

 

[Joe Murphy]

Nice info link but it doesn't give any hints about what to do when it
doesn't work.
joe

 

[Carey Frisch [MVP]]

Does your processor support Hyper-Threading?
Please send details of your CPU and motherboard.

Hyper-Threading Technology
http://www.intel.com/technology/hyperthread/

"Hyper-Threading Technology requires a computer system with
an Intel® Pentium® 4 processor supporting Hyper-Threading
Technology and an HT Technology enabled chipset, BIOS and
operating system."

--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User
Microsoft Newsgroups

Be Smart! Protect Your PC!
http://www.microsoft.com/athome/security/protect/default.mspx

------------------------------------------------------------------------------

:

| Nice info link but it doesn't give any hints about what to do when it
| doesn't work.
| joe

 

[Joe Murphy]

Processor is a 3.06GHz Northwood D stepping. The Motherboard is a ECS L4VXA2
with via vt8754 northbridge and vt8235 southbridge. I replaced a 2.GHz CPU.
The BIOS does recognize HYPERTHREADING and displays a notice of such at
bootup. Hyperthreading is enabled in the BIOS.
The BIOS upgrade is Phoenix Technology 6.0 PG dated 06/16/2003
joe

 

[Leythos]

Processor is a 3.06GHz Northwood D stepping. The Motherboard is a ECS L4VXA2
with via vt8754 northbridge and vt8235 southbridge. I replaced a 2.GHz CPU.
The BIOS does recognize HYPERTHREADING and displays a notice of such at
bootup. Hyperthreading is enabled in the BIOS.
The BIOS upgrade is Phoenix Technology 6.0 PG dated 06/16/2003

Was this an upgrade to a HT CPU or did you install from scratch?

If it was an upgrade I'm guessing your using the single CPU kernel and
just need to update to the multi-cpu kernel.

 

[Carey Frisch [MVP]]

Open Task Manager > Performance tab and from
the Toolbar select: View > CPU History > One graph per CPU.
Do you see one or two graphs?

--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User
Microsoft Newsgroups

Be Smart! Protect Your PC!
http://www.microsoft.com/athome/security/protect/default.mspx

------------------------------------------------------------------------------

:

| Processor is a 3.06GHz Northwood D stepping. The Motherboard is a ECS L4VXA2
| with via vt8754 northbridge and vt8235 southbridge. I replaced a 2.GHz CPU.
| The BIOS does recognize HYPERTHREADING and displays a notice of such at
| bootup. Hyperthreading is enabled in the BIOS.
| The BIOS upgrade is Phoenix Technology 6.0 PG dated 06/16/2003
| joe

 

[Joe Murphy]

1, looks the same as my other PC
THE HT CPU IS A REPLACEMENT
joe

 

[Leythos]

1, looks the same as my other PC
THE HT CPU IS A REPLACEMENT

You need to install the multi-cpu kernel: Open Device Manager, expand
COMPUTER, you should see UniProcessor, right click on it and select SCAN
FOR HARDWARE CHANGES. If this doesn't install the new kernel then you
might have to right click, update driver, and then pick the multi-cpu
driver, on my Windows 2003 servers it shows ACPI Multi-Processor.

 

[NobodyMan]

I can't get XP to recognize HYPERTHREADING. The bios has hyperthreading
enabled and, at bootup, HYPERTHREADING is recognized. I have done repair
install of XP and loaded SP2. Is a clean install required (UG!)?
joe

IIRC, you asked this yesterday and received many replies. Have you
read or tried any of them?

 

[Carey Frisch [MVP]]

I guess the only solution is to proceed with a
"clean install" of Windows XP.

Clean Install Windows XP
http://www.michaelstevenstech.com/cleanxpinstall.html

--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User
Microsoft Newsgroups

Be Smart! Protect Your PC!
http://www.microsoft.com/athome/security/protect/default.mspx

------------------------------------------------------------------------------

:

| 1, looks the same as my other PC
| THE HT CPU IS A REPLACEMENT
| joe

 

[Joe Murphy]

I don't see uniprocessor. I see ACPI Computer. (On my other PC [xp home] I
see uniprocessor). I wonder if I'm missing something.

I scanned both "processor" and "computer" for changes and nothing happened.

Any idea about where to get/install the multi-cpu kernel?
joe

 

[Leythos]

I don't see uniprocessor. I see ACPI Computer. (On my other PC [xp home]
I see uniprocessor). I wonder if I'm missing something.

I scanned both "processor" and "computer" for changes and nothing
happened.

Any idea about where to get/install the multi-cpu kernel? joe

I didn't know you were using XP Home edition - you can not use the
multi-cpu kernel with HOME Edition:

http://www.microsoft.com/windowsxp/pro/howtobuy/choosing2.mspx

Scalable processor support (2 CPU) is only supported on Professional.

 

[Leythos]

No, my other PC is home edition. The PC I'm working on is PRO SP2.

Sorry, I missed that in the thread - you should be able to select Update
Driver and then select COMPUTER and ACPI multi-processor, just make sure
you have a backup before you implement this change.

joe

I don't see uniprocessor. I see ACPI Computer. (On my other PC [xp home]
I see uniprocessor). I wonder if I'm missing something.

I scanned both "processor" and "computer" for changes and nothing
happened.

Any idea about where to get/install the multi-cpu kernel? joe

I didn't know you were using XP Home edition - you can not use the
multi-cpu kernel with HOME Edition:

http://www.microsoft.com/windowsxp/pro/howtobuy/choosing2.mspx

Scalable processor support (2 CPU) is only supported on Professional.

 

[Joe Murphy]

No, my other PC is home edition. The PC I'm working on is PRO SP2.

joe

I don't see uniprocessor. I see ACPI Computer. (On my other PC [xp home]
I see uniprocessor). I wonder if I'm missing something.

I scanned both "processor" and "computer" for changes and nothing
happened.

Any idea about where to get/install the multi-cpu kernel? joe

I didn't know you were using XP Home edition - you can not use the
multi-cpu kernel with HOME Edition:

http://www.microsoft.com/windowsxp/pro/howtobuy/choosing2.mspx

Scalable processor support (2 CPU) is only supported on Professional.

 

[Joe Murphy]

When I asked the question my BIOS didn't show HT. I fixed that with a BIOS
update.

 

[Leythos]

When I asked the question my BIOS didn't show HT. I fixed that with a BIOS
update.

Did you also download new chipset drivers from the board vendor - if they
have them?

Did you look at the BIOS update README file to see what notes it contained
about XP, HT and detection?

 

[Joe Murphy]

No, I didn't but I'll look into it. I did update the drivers for the
processor. Thanks for your help

joe