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Device Manager reports 2 CPUs

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Anonymous
a b à CPUs
September 8, 2004 4:24:09 AM

Archived from groups: microsoft.public.windowsxp.hardware,comp.sys.ibm.pc.hardware.misc,comp.sys.hp.hardware (More info?)

I have a 3-month-old HP Pavilion a450n desktop computer running Windows
XP SP1.

Device Manager reports two CPUs instead of one, like this:

[machine name]
ACPI Multiprocessor PC
Microsoft ACPI-Compliant System
Intel(R) Pentium(R) 4 CPU 3.00GHz
Intel(R) Pentium(R) 4 CPU 3.00GHz

Is this a symptom of Intel's "hyperthreading," or is my machine very
confused about its own brain?

Thanks,
- Bob
Anonymous
a b à CPUs
September 8, 2004 4:24:10 AM

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

> I have a 3-month-old HP Pavilion a450n desktop computer running
Windows
> XP SP1.
>
> Device Manager reports two CPUs instead of one, like this:
>
> [machine name]
> ACPI Multiprocessor PC
> Microsoft ACPI-Compliant System
> Intel(R) Pentium(R) 4 CPU 3.00GHz
> Intel(R) Pentium(R) 4 CPU 3.00GHz
>
> Is this a symptom of Intel's "hyperthreading," or is my machine very
> confused about its own brain?

Its because of Hyperthreading. Task Manager will also display two
CPUs on the Performance Tab if 'One Graph per CPU' is checked.

----
Papaboojum
Anonymous
a b à CPUs
September 8, 2004 4:24:10 AM

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Bob Weissman wrote:

> I have a 3-month-old HP Pavilion a450n desktop computer running Windows
> XP SP1.
>
> Device Manager reports two CPUs instead of one, like this:
>
> [machine name]
> ACPI Multiprocessor PC
> Microsoft ACPI-Compliant System
> Intel(R) Pentium(R) 4 CPU 3.00GHz
> Intel(R) Pentium(R) 4 CPU 3.00GHz
>
> Is this a symptom of Intel's "hyperthreading," or is my machine very
> confused about its own brain?
>
> Thanks,
> - Bob
>

I have a DELL Dimension 8300. The manual states that if Hyperthreading
is enabled in the BIOS, the processor will show up twice in the Device
Manger.

Harvey
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Anonymous
a b à CPUs
September 8, 2004 4:24:10 AM

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Hello

Setting shown are correcting called hyperthreading by Intel


Alvin

Bob Weissman wrote:

> I have a 3-month-old HP Pavilion a450n desktop computer running Windows
> XP SP1.
>
> Device Manager reports two CPUs instead of one, like this:
>
> [machine name]
> ACPI Multiprocessor PC
> Microsoft ACPI-Compliant System
> Intel(R) Pentium(R) 4 CPU 3.00GHz
> Intel(R) Pentium(R) 4 CPU 3.00GHz
>
> Is this a symptom of Intel's "hyperthreading," or is my machine very
> confused about its own brain?
>
> Thanks,
> - Bob
Anonymous
a b à CPUs
September 8, 2004 4:24:10 AM

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Seems you have hyperthreading turned on in the BIOS
as the most likely cause.

"Bob Weissman" <rlw@rlw.best.vwh.net> wrote in message
news:Jis%c.6115$NC6.6083@newsread1.mlpsca01.us.to.verio.net...
>I have a 3-month-old HP Pavilion a450n desktop computer running Windows
> XP SP1.
>
> Device Manager reports two CPUs instead of one, like this:
>
> [machine name]
> ACPI Multiprocessor PC
> Microsoft ACPI-Compliant System
> Intel(R) Pentium(R) 4 CPU 3.00GHz
> Intel(R) Pentium(R) 4 CPU 3.00GHz
>
> Is this a symptom of Intel's "hyperthreading," or is my machine very
> confused about its own brain?
>
> Thanks,
> - Bob
>
Anonymous
a b à CPUs
September 8, 2004 4:24:10 AM

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

On Wed, 08 Sep 2004 00:24:09 GMT
rlw@rlw.best.vwh.net (Bob Weissman) wrote:

> Is this a symptom of Intel's "hyperthreading," or is my machine very
> confused about its own brain?

The former.

--
Stefaan
--
"What is stated clearly conceives easily." -- Inspired sales droid
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