Hyperthreading On or Off?

[RJ]

Hi all,

I have an Intel P4 3.06Ghz Hyperthreading Processor running Windows XP Home
(All latest Service packs installed).

Looking at my system:
Windows Device Manager shows ACPI Multiprocessor PC
2 Processors are listed under Processors

So Far So Good?

So why do Benchmarking and Diagnostic Programmes (SiSoft Sandra, Aquamark)
tell me that Hyperthreading is disabled?

Additionally, I read that if HT is working properly, there should be two
processor graphs in Windows Task Manager? I only have one.


I had the PC almost a year and I still don't know if HT is working, despite
looking for info on the net.
Is there a reliable HT analysis / testing program out there?

TIA

Rich Johnston
http://www.stats.rjnc.com - Free Web Stats Service

 

[@drian]

Additionally, I read that if HT is working properly, there should be two
processor graphs in Windows Task Manager? I only have one.


I had the PC almost a year and I still don't know if HT is working, despite
looking for info on the net.
Is there a reliable HT analysis / testing program out there?

Because I suspect Windows XP Home is designed *not* to support multiple
processors. So far as I know, only XP Pro can support multiple processors,
up to two. The extra processor that XP shows is a virtual processor (i.e.
not real) courtesy of HyperThreading. I'm not sure why it would even show
it under XP Home.

@drian.

 

[Pavel A.]

Additionally, I read that if HT is working properly, there should be two
processor graphs in Windows Task Manager? I only have one.

This means HT is disabled. When enabled you will see two graphs.
Check all pages of your BIOS setup. HT on/off option can be tucked in some odd place.
In my Award BIOS it is on boot options page.

-- PA

 

[Guest]

you will probably have to reinstall windows if you enable
hypterhtreading. not that it helps much, anyway.

 

[RJ]

Because I suspect Windows XP Home is designed *not* to support multiple
processors. So far as I know, only XP Pro can support multiple processors,
up to two.

You suspect wrong. According to Microsoft, XP Home does support
Hyperthreading.
http://support.microsoft.com/default.aspx?scid=kb;en-us;810231

I'll keep on looking!

RJ
http://www.stats.rjnc.com - Free Public and Private Web Stats

 

[Alvin A Brown]

Hello

That feature is turned on in the System Bios ok so that's how
you turn it on or off

Alvin

 

[Guest]

-----Original Message-----
HT is working,
despite there?

Because I suspect Windows XP Home is designed *not* to support multiple
processors. So far as I know, only XP Pro can support multiple processors,
up to two. The extra processor that XP shows is a virtual processor (i.e.
not real) courtesy of HyperThreading. I'm not sure why it would even show
it under XP Home.

@drian.


.
Check to see if your motherboard can support

Hyperthreading. A P4 HT processor is designed to work on
a motherboard with or without HT support. Look in the
BIOS set-up screen to see if you have the option to turn
Hyperthreading on or off. Some motherboards leave it off
as default. Try pressing the <Esc>, F1, F8, or <Delete>
keys when your computer is first booting up to enter the
BIOS menu.

Brian