enabling HyperThreading

Posted: 09-20-2003, 06:04 AM
I have a P4 3.06 Ghz CPU that is supposedly capable of
Hyperthreading. I have absolutely no clue on how to
actually enable it though. I was hoping it would just be
as simple as going to the bios and choosing enable.
However, when I did this all that happend was 2
processors were listed in device manager instead of just
one. Everywhere else I look still acts like HT is
disabled. I have tried searching intels site as well as
several other places for how to enable it but none of it
makes sense to me. I read something about having to
change things in the kernal but I have yet to find
a "step by step idiot proof guide" on how to do that. I'm
using Windows XP Pro. Can any of you help with this?

Thanks

enabling HyperThreading


Responses to "enabling HyperThreading"

Bob Knowlden
Guest
Posts: n/a
 
Re: enabling HyperThreading
Posted: 09-21-2003, 02:29 AM
The P4 3.06 supports HT. (It's the only 533 MHz FSB P4 that does, I
believe.)

If your CPU shows up as 2 (logical) processors in Device Manager, it seems
that XP is recognizing it. Another check would be going to System Devices in
Device Manager, and checking Microsoft ACPI-Compliant System. If it says
"multiprocessor PC", I expect that means that the correct HAL is installed.

I don't know what you mean by "Everywhere else I look still acts like HT is
disabled." I'm probably displaying my ignorance, but I don't know where
hyperthreading would be obvious.

Sisoft Sandra (http://www.sisoftware.net/) informs me that my CPU does smt
(symmetric multi-threading). Sandra also runs a CPU benchmark. You can use
an option to turn off hyperthreading; that ought make a noticeable change.

Maybe your system doesn't have a problem, after all.

Good luck.

Bob Knowlden

Address altered to avoid spam. Replace nkbob with bobkn.

"Sean" <Scn64@mchsi.com> wrote in message
news:0baa01c37f3c$fd7ed960$a301280a@phx.gbl...
> I have a P4 3.06 Ghz CPU that is supposedly capable of
> Hyperthreading. I have absolutely no clue on how to
> actually enable it though. I was hoping it would just be
> as simple as going to the bios and choosing enable.
> However, when I did this all that happend was 2
> processors were listed in device manager instead of just
> one. Everywhere else I look still acts like HT is
> disabled. I have tried searching intels site as well as
> several other places for how to enable it but none of it
> makes sense to me. I read something about having to
> change things in the kernal but I have yet to find
> a "step by step idiot proof guide" on how to do that. I'm
> using Windows XP Pro. Can any of you help with this?
>
> Thanks
>

Kev
Guest
Posts: n/a
 
Re: enabling HyperThreading
Posted: 09-21-2003, 05:33 AM
Another place to look is in the task manager if you see two seperate cpu
history windows HT is enbabled if not double check the option to display two
if there isn't anything you have to reinstall to enable HT sucks don't it ?
I had to do just that.
Hope that helps,
Kev
"Bob Knowlden" <nkbob@comcast.net> wrote in message
news:OcQn9g#fDHA.576@tk2msftngp13.phx.gbl...
> The P4 3.06 supports HT. (It's the only 533 MHz FSB P4 that does, I
> believe.)
>
> If your CPU shows up as 2 (logical) processors in Device Manager, it seems
> that XP is recognizing it. Another check would be going to System Devices
in
> Device Manager, and checking Microsoft ACPI-Compliant System. If it says
> "multiprocessor PC", I expect that means that the correct HAL is
installed.
>
> I don't know what you mean by "Everywhere else I look still acts like HT
is
> disabled." I'm probably displaying my ignorance, but I don't know where
> hyperthreading would be obvious.
>
> Sisoft Sandra (http://www.sisoftware.net/) informs me that my CPU does smt
> (symmetric multi-threading). Sandra also runs a CPU benchmark. You can use
> an option to turn off hyperthreading; that ought make a noticeable change.
>
> Maybe your system doesn't have a problem, after all.
>
> Good luck.
>
> Bob Knowlden
>
> Address altered to avoid spam. Replace nkbob with bobkn.
>
> "Sean" <Scn64@mchsi.com> wrote in message
> news:0baa01c37f3c$fd7ed960$a301280a@phx.gbl...
> > I have a P4 3.06 Ghz CPU that is supposedly capable of
> > Hyperthreading. I have absolutely no clue on how to
> > actually enable it though. I was hoping it would just be
> > as simple as going to the bios and choosing enable.
> > However, when I did this all that happend was 2
> > processors were listed in device manager instead of just
> > one. Everywhere else I look still acts like HT is
> > disabled. I have tried searching intels site as well as
> > several other places for how to enable it but none of it
> > makes sense to me. I read something about having to
> > change things in the kernal but I have yet to find
> > a "step by step idiot proof guide" on how to do that. I'm
> > using Windows XP Pro. Can any of you help with this?
> >
> > Thanks
> >
>
>

Paul
Guest
Posts: n/a
 
Re: enabling HyperThreading
Posted: 09-24-2003, 06:03 AM
Umm the 2.4 also supports HT on
the 800 FSB. And yup ONLY the
3.06 supports HT on the 533 mhz

I just brought a 2.4 800mhz cpu today
and installed it, and yup.

All it does it as Bob said, its
shows Multiprocessor PC in Device
Manager. Mine doesnt actually show
2 CPU's in task manager, BUT I have
enabled it in BIOS.

I would say it doesnt show
2 CPU's because I installed the new CPU
on a PC with XP currently installed on it.

And all XP changed was the processor

I think I wld haveta reformat in order to show
2 CPU's.



"Bob Knowlden" <nkbob@comcast.net> wrote in message
news:OcQn9g%23fDHA.576@tk2msftngp13.phx.gbl...
> The P4 3.06 supports HT. (It's the only 533 MHz FSB P4 that does, I
> believe.)
>
> If your CPU shows up as 2 (logical) processors in Device Manager, it seems
> that XP is recognizing it. Another check would be going to System Devices
in
> Device Manager, and checking Microsoft ACPI-Compliant System. If it says
> "multiprocessor PC", I expect that means that the correct HAL is
installed.
>
> I don't know what you mean by "Everywhere else I look still acts like HT
is
> disabled." I'm probably displaying my ignorance, but I don't know where
> hyperthreading would be obvious.
>
> Sisoft Sandra (http://www.sisoftware.net/) informs me that my CPU does smt
> (symmetric multi-threading). Sandra also runs a CPU benchmark. You can use
> an option to turn off hyperthreading; that ought make a noticeable change.
>
> Maybe your system doesn't have a problem, after all.
>
> Good luck.
>
> Bob Knowlden
>
> Address altered to avoid spam. Replace nkbob with bobkn.
>
> "Sean" <Scn64@mchsi.com> wrote in message
> news:0baa01c37f3c$fd7ed960$a301280a@phx.gbl...
> > I have a P4 3.06 Ghz CPU that is supposedly capable of
> > Hyperthreading. I have absolutely no clue on how to
> > actually enable it though. I was hoping it would just be
> > as simple as going to the bios and choosing enable.
> > However, when I did this all that happend was 2
> > processors were listed in device manager instead of just
> > one. Everywhere else I look still acts like HT is
> > disabled. I have tried searching intels site as well as
> > several other places for how to enable it but none of it
> > makes sense to me. I read something about having to
> > change things in the kernal but I have yet to find
> > a "step by step idiot proof guide" on how to do that. I'm
> > using Windows XP Pro. Can any of you help with this?
> >
> > Thanks
> >
>
>

Jim Macklin
Guest
Posts: n/a
 
Re: enabling HyperThreading
Posted: 09-24-2003, 06:21 AM
Just a repair install is needed per

http://support.microsoft.com/default...;EN-US;Q315341


"Paul" <noone@home.com> wrote in message
news:bkrc34$85b$1@lust.ihug.co.nz...
| Umm the 2.4 also supports HT on
| the 800 FSB. And yup ONLY the
| 3.06 supports HT on the 533 mhz
|
| I just brought a 2.4 800mhz cpu today
| and installed it, and yup.
|
| All it does it as Bob said, its
| shows Multiprocessor PC in Device
| Manager. Mine doesnt actually show
| 2 CPU's in task manager, BUT I have
| enabled it in BIOS.
|
| I would say it doesnt show
| 2 CPU's because I installed the new CPU
| on a PC with XP currently installed on it.
|
| And all XP changed was the processor
|
| I think I wld haveta reformat in order to show
| 2 CPU's.
|
|
|
| "Bob Knowlden" <nkbob@comcast.net> wrote in message
| news:OcQn9g%23fDHA.576@tk2msftngp13.phx.gbl...
| > The P4 3.06 supports HT. (It's the only 533 MHz FSB P4
that does, I
| > believe.)
| >
| > If your CPU shows up as 2 (logical) processors in Device
Manager, it seems
| > that XP is recognizing it. Another check would be going
to System Devices
| in
| > Device Manager, and checking Microsoft ACPI-Compliant
System. If it says
| > "multiprocessor PC", I expect that means that the
correct HAL is
| installed.
| >
| > I don't know what you mean by "Everywhere else I look
still acts like HT
| is
| > disabled." I'm probably displaying my ignorance, but I
don't know where
| > hyperthreading would be obvious.
| >
| > Sisoft Sandra (http://www.sisoftware.net/) informs me
that my CPU does smt
| > (symmetric multi-threading). Sandra also runs a CPU
benchmark. You can use
| > an option to turn off hyperthreading; that ought make a
noticeable change.
| >
| > Maybe your system doesn't have a problem, after all.
| >
| > Good luck.
| >
| > Bob Knowlden
| >
| > Address altered to avoid spam. Replace nkbob with bobkn.
| >
| > "Sean" <Scn64@mchsi.com> wrote in message
| > news:0baa01c37f3c$fd7ed960$a301280a@phx.gbl...
| > > I have a P4 3.06 Ghz CPU that is supposedly capable of
| > > Hyperthreading. I have absolutely no clue on how to
| > > actually enable it though. I was hoping it would just
be
| > > as simple as going to the bios and choosing enable.
| > > However, when I did this all that happend was 2
| > > processors were listed in device manager instead of
just
| > > one. Everywhere else I look still acts like HT is
| > > disabled. I have tried searching intels site as well
as
| > > several other places for how to enable it but none of
it
| > > makes sense to me. I read something about having to
| > > change things in the kernal but I have yet to find
| > > a "step by step idiot proof guide" on how to do that.
I'm
| > > using Windows XP Pro. Can any of you help with this?
| > >
| > > Thanks
| > >
| >
| >
|
|


 
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