Dual Xeons with Hyperthreading in XP?

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

Have just built a new system based on 2 x Xeon 3.2 GHz 800 FSB CPUs. They
are on an Asus NCCH-DL mainboard. Windows XP Pro only "sees" two logical
processors not four as expected. The BIOS sees both CPUs and recognises they
are hyperthreaded, but thats about it. Even the Intel utilities don't report
two physical processors are present. I get mixed results on hyperthreading &
the chipset utilities.

Can Win XP Pro support dual hyperthreaded processors (i.e. 4 logical
processors?) If so, how do I get Windows to recognise and report things
correctly?
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Windows XP Pro does support hyperthreading, but a quick look
at Intel.com indicates that the Xeon DOES NOT support
hyperthreading, the only references I saw were to P4 with
hyperthreading.
Asus web site
http://www.asus.com/products/server/srv-mb/ncch-dl/overview.htm
doesn't mention hyperthreading either.


--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.



"WallOne" <WallOne@discussions.microsoft.com> wrote in
message
news:F1D206BB-E56A-4186-974B-7311BB98B125@microsoft.com...
| Have just built a new system based on 2 x Xeon 3.2 GHz 800
FSB CPUs. They
| are on an Asus NCCH-DL mainboard. Windows XP Pro only
"sees" two logical
| processors not four as expected. The BIOS sees both CPUs
and recognises they
| are hyperthreaded, but thats about it. Even the Intel
utilities don't report
| two physical processors are present. I get mixed results
on hyperthreading &
| the chipset utilities.
|
| Can Win XP Pro support dual hyperthreaded processors (i.e.
4 logical
| processors?) If so, how do I get Windows to recognise and
report things
| correctly?
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Jim,

Yes the current 800 Mhz FSB XEONs do support HT. Have a look at the XEON
800 FSB link at this Intel page:

http://support.intel.com/design/Xeon/documentation.htm

Does anyone know if where there is an official reference to Win XP Pro being
capable of recognising 2 x HT processors, ie 4 logical ones?

"Jim Macklin" wrote:

> Windows XP Pro does support hyperthreading, but a quick look
> at Intel.com indicates that the Xeon DOES NOT support
> hyperthreading, the only references I saw were to P4 with
> hyperthreading.
> Asus web site
> http://www.asus.com/products/server/srv-mb/ncch-dl/overview.htm
> doesn't mention hyperthreading either.
>
>
> --
> The people think the Constitution protects their rights;
> But government sees it as an obstacle to be overcome.
>
>
>
> "WallOne" <WallOne@discussions.microsoft.com> wrote in
> message
> news:F1D206BB-E56A-4186-974B-7311BB98B125@microsoft.com...
> | Have just built a new system based on 2 x Xeon 3.2 GHz 800
> FSB CPUs. They
> | are on an Asus NCCH-DL mainboard. Windows XP Pro only
> "sees" two logical
> | processors not four as expected. The BIOS sees both CPUs
> and recognises they
> | are hyperthreaded, but thats about it. Even the Intel
> utilities don't report
> | two physical processors are present. I get mixed results
> on hyperthreading &
> | the chipset utilities.
> |
> | Can Win XP Pro support dual hyperthreaded processors (i.e.
> 4 logical
> | processors?) If so, how do I get Windows to recognise and
> report things
> | correctly?
>
>
>
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

On Wed, 27 Apr 2005 00:40:07 -0500, Jim Macklin wrote:

> Windows XP Pro does support hyperthreading, but a quick look at
> Intel.com indicates that the Xeon DOES NOT support hyperthreading, the
> only references I saw were to P4 with hyperthreading.
> Asus web site
> http://www.asus.com/products/server/srv-mb/ncch-dl/overview.htm doesn't
> mention hyperthreading either.

I hate to say this, but MY XEON Boards and Windows 2003 Server support HT,
in fact, I can see the difference between HT ON and HT Off in some
applications.

XEON's in the P4 era, fully support HT.

--
spam999free@rrohio.com
remove 999 in order to email me
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

I looked at the two web sites I mentioned and they did not
cite hyperthreading, except for the P4.
Perhaps you can help the OP since you have a system working.
He is using XP Pro and you have Windows 2003 Server,
Perhaps the OP should run EVEREST and get the exact model
numbers for his system components and check for the settings
he needs in the BIOS, and then reinstall his system after
the function is enabled in the BIOS.
With two CPUs the OP should be seeing 4 processors. XP Pro
does support dual processors, I wonder if the OP is mistaken
and using XP Home?



"Leythos" <void@nowhere.lan> wrote in message
news:%tHbe.5082$dh.991@tornado.ohiordc.rr.com...
| On Wed, 27 Apr 2005 00:40:07 -0500, Jim Macklin wrote:
|
| > Windows XP Pro does support hyperthreading, but a quick
look at
| > Intel.com indicates that the Xeon DOES NOT support
hyperthreading, the
| > only references I saw were to P4 with hyperthreading.
| > Asus web site
| >
http://www.asus.com/products/server/srv-mb/ncch-dl/overview.htm
doesn't
| > mention hyperthreading either.
|
| I hate to say this, but MY XEON Boards and Windows 2003
Server support HT,
| in fact, I can see the difference between HT ON and HT Off
in some
| applications.
|
| XEON's in the P4 era, fully support HT.
|
| --
| spam999free@rrohio.com
| remove 999 in order to email me
|
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Found this link on the bottom, the very bottom, of the page
you linked...
http://support.intel.com/business/bss/products/hyperthreading/server/ht_server.pdf

It doesn't seem to be a big marketing push.


http://support.microsoft.com/default.aspx?scid=kb;en-us;810231

http://support.intel.com/support/processors/sb/CS-007880.htm


"WallOne" <WallOne@discussions.microsoft.com> wrote in
message
news:61587719-8017-4F76-BB7D-20F2B6D94A41@microsoft.com...
| Jim,
|
| Yes the current 800 Mhz FSB XEONs do support HT. Have a
look at the XEON
| 800 FSB link at this Intel page:
|
| http://support.intel.com/design/Xeon/documentation.htm
|
| Does anyone know if where there is an official reference
to Win XP Pro being
| capable of recognising 2 x HT processors, ie 4 logical
ones?
|
| "Jim Macklin" wrote:
|
| > Windows XP Pro does support hyperthreading, but a quick
look
| > at Intel.com indicates that the Xeon DOES NOT support
| > hyperthreading, the only references I saw were to P4
with
| > hyperthreading.
| > Asus web site
| >
http://www.asus.com/products/server/srv-mb/ncch-dl/overview.htm
| > doesn't mention hyperthreading either.
| >
| >
| > --
| > The people think the Constitution protects their rights;
| > But government sees it as an obstacle to be overcome.
| >
| >
| >
| > "WallOne" <WallOne@discussions.microsoft.com> wrote in
| > message
| >
news:F1D206BB-E56A-4186-974B-7311BB98B125@microsoft.com...
| > | Have just built a new system based on 2 x Xeon 3.2 GHz
800
| > FSB CPUs. They
| > | are on an Asus NCCH-DL mainboard. Windows XP Pro only
| > "sees" two logical
| > | processors not four as expected. The BIOS sees both
CPUs
| > and recognises they
| > | are hyperthreaded, but thats about it. Even the Intel
| > utilities don't report
| > | two physical processors are present. I get mixed
results
| > on hyperthreading &
| > | the chipset utilities.
| > |
| > | Can Win XP Pro support dual hyperthreaded processors
(i.e.
| > 4 logical
| > | processors?) If so, how do I get Windows to recognise
and
| > report things
| > | correctly?
| >
| >
| >
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

On Wed, 27 Apr 2005 07:30:32 -0500, Jim Macklin wrote:
>
> I looked at the two web sites I mentioned and they did not cite
> hyperthreading, except for the P4. Perhaps you can help the OP since you
> have a system working. He is using XP Pro and you have Windows 2003
> Server, Perhaps the OP should run EVEREST and get the exact model
> numbers for his system components and check for the settings he needs in
> the BIOS, and then reinstall his system after the function is enabled in
> the BIOS.
> With two CPUs the OP should be seeing 4 processors. XP Pro does support
> dual processors, I wonder if the OP is mistaken and using XP Home?

Most of my servers have Dual or Quad 2.4ghz Xeon CPU's and show as 4 or 8
CPU's. I don't have any Dual XP Prof workstations, but since XP supports 2
CPU's I would only expect it to show 2 CPU's on a Dual Xeon box.

What we need is someone using XP Prof and running Dual Xeon CPU's to tell
us what they see.


--
spam999free@rrohio.com
remove 999 in order to email me
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

XP Pro should support 4 virtual processor (but maybe with SP2???)

"Leythos" <void@nowhere.lan> wrote in message
news:HZLbe.781$Eg.23@tornado.ohiordc.rr.com...
> On Wed, 27 Apr 2005 07:30:32 -0500, Jim Macklin wrote:
>>
>> I looked at the two web sites I mentioned and they did not cite
>> hyperthreading, except for the P4. Perhaps you can help the OP since you
>> have a system working. He is using XP Pro and you have Windows 2003
>> Server, Perhaps the OP should run EVEREST and get the exact model
>> numbers for his system components and check for the settings he needs in
>> the BIOS, and then reinstall his system after the function is enabled in
>> the BIOS.
>> With two CPUs the OP should be seeing 4 processors. XP Pro does support
>> dual processors, I wonder if the OP is mistaken and using XP Home?
>
> Most of my servers have Dual or Quad 2.4ghz Xeon CPU's and show as 4 or 8
> CPU's. I don't have any Dual XP Prof workstations, but since XP supports 2
> CPU's I would only expect it to show 2 CPU's on a Dual Xeon box.
>
> What we need is someone using XP Prof and running Dual Xeon CPU's to tell
> us what they see.
>
>
> --
> spam999free@rrohio.com
> remove 999 in order to email me
>
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

"Leythos" <void@nowhere.lan> wrote in message
news:HZLbe.781$Eg.23@tornado.ohiordc.rr.com...
> On Wed, 27 Apr 2005 07:30:32 -0500, Jim Macklin wrote:
> >
> > I looked at the two web sites I mentioned and they did not cite
> > hyperthreading, except for the P4. Perhaps you can help the OP since you
> > have a system working. He is using XP Pro and you have Windows 2003
> > Server, Perhaps the OP should run EVEREST and get the exact model
> > numbers for his system components and check for the settings he needs in
> > the BIOS, and then reinstall his system after the function is enabled in
> > the BIOS.
> > With two CPUs the OP should be seeing 4 processors. XP Pro does support
> > dual processors, I wonder if the OP is mistaken and using XP Home?
>
> Most of my servers have Dual or Quad 2.4ghz Xeon CPU's and show as 4 or 8
> CPU's. I don't have any Dual XP Prof workstations, but since XP supports 2
> CPU's I would only expect it to show 2 CPU's on a Dual Xeon box.
>
> What we need is someone using XP Prof and running Dual Xeon CPU's to tell
> us what they see.

You got it.

Running 2.8G Xeons/533 on an ASUS PC-DL.

4 processors shown in Device Manager.

Problems of the OP's type are often caused by NOT having HT
turned on in the BIOS before installing XP. If HT is off, XP will
not install the correct HAL for the system.

>
>
> --
> spam999free@rrohio.com
> remove 999 in order to email me
>
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Yes he should run Everest. I have P4 dual Xeon 3.0 with hyperthreading and
using W2K3 and Everest reports as such.

--
Peter

Please reply to Newsgroup for the benefit of others.


"Jim Macklin" <p51mustang[threeX12]@xxxhotmail.calm> wrote in message
news:uVXrQWySFHA.580@TK2MSFTNGP15.phx.gbl...
>I looked at the two web sites I mentioned and they did not
> cite hyperthreading, except for the P4.
> Perhaps you can help the OP since you have a system working.
> He is using XP Pro and you have Windows 2003 Server,
> Perhaps the OP should run EVEREST and get the exact model
> numbers for his system components and check for the settings
> he needs in the BIOS, and then reinstall his system after
> the function is enabled in the BIOS.
> With two CPUs the OP should be seeing 4 processors. XP Pro
> does support dual processors, I wonder if the OP is mistaken
> and using XP Home?
>
>
>
> "Leythos" <void@nowhere.lan> wrote in message
> news:%tHbe.5082$dh.991@tornado.ohiordc.rr.com...
> | On Wed, 27 Apr 2005 00:40:07 -0500, Jim Macklin wrote:
> |
> | > Windows XP Pro does support hyperthreading, but a quick
> look at
> | > Intel.com indicates that the Xeon DOES NOT support
> hyperthreading, the
> | > only references I saw were to P4 with hyperthreading.
> | > Asus web site
> | >
> http://www.asus.com/products/server/srv-mb/ncch-dl/overview.htm
> doesn't
> | > mention hyperthreading either.
> |
> | I hate to say this, but MY XEON Boards and Windows 2003
> Server support HT,
> | in fact, I can see the difference between HT ON and HT Off
> in some
> | applications.
> |
> | XEON's in the P4 era, fully support HT.
> |
> | --
> | spam999free@rrohio.com
> | remove 999 in order to email me
> |
>
>
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

On Wed, 27 Apr 2005 18:15:27 -0700, V Green wrote:
>
> Problems of the OP's type are often caused by NOT having HT turned on in
> the BIOS before installing XP. If HT is off, XP will not install the
> correct HAL for the system.

But if it's turned OFF before install, and he has two physical CPU's (not
logical) then the ACPI Multi kernel is installed by default - HT would be
available IF the two CPU's were installed during the XP install even if HT
was disabled.

If the second CPU was added after the install, and HT was disabled all
along, then the update to the ACPI Multi kernel would be needed.

--
spam999free@rrohio.com
remove 999 in order to email me
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

"Leythos" <void@nowhere.lan> wrote in message
news:FtXbe.11024$dh.5317@tornado.ohiordc.rr.com...
> On Wed, 27 Apr 2005 18:15:27 -0700, V Green wrote:
> >
> > Problems of the OP's type are often caused by NOT having HT turned on in
> > the BIOS before installing XP. If HT is off, XP will not install the
> > correct HAL for the system.
>
> But if it's turned OFF before install, and he has two physical CPU's (not
> logical) then the ACPI Multi kernel is installed by default - HT would be
> available IF the two CPU's were installed during the XP install even if HT
> was disabled.
>
> If the second CPU was added after the install, and HT was disabled all
> along, then the update to the ACPI Multi kernel would be needed.

I know, it doesn't make sense.

All I can say it that in the past, when this happened to
some other users, HT was turned OFF in the BIOS, and
when it was turned ON, and XP was reinstalled, all was well.

Go figure. Perhaps a mgfr.-specific BIOS issue.

>
> --
> spam999free@rrohio.com
> remove 999 in order to email me
>
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

I reply to a bunch of queres raised, some updates and notes.

Definately playing with Win XP Pro (OEM).
HT was enabled during XP installation.
After XP installation, saw 2 CPUs whether HT was turned on or off.
Am convinced Win XP Pro should be able to handle 2 physical/4 logical CPUs
Have recently tried Win Server 2003, still only 2 CPUs showing.
Suspect a faulty mainboard. Both chips work fine but can't run Asus NCCH-DL
board without a chip in socket 1. Maybe socket 2 is faulty.
Asus website no help whatsoever.....

"V Green" wrote:

>
> "Leythos" <void@nowhere.lan> wrote in message
> news:FtXbe.11024$dh.5317@tornado.ohiordc.rr.com...
> > On Wed, 27 Apr 2005 18:15:27 -0700, V Green wrote:
> > >
> > > Problems of the OP's type are often caused by NOT having HT turned on in
> > > the BIOS before installing XP. If HT is off, XP will not install the
> > > correct HAL for the system.
> >
> > But if it's turned OFF before install, and he has two physical CPU's (not
> > logical) then the ACPI Multi kernel is installed by default - HT would be
> > available IF the two CPU's were installed during the XP install even if HT
> > was disabled.
> >
> > If the second CPU was added after the install, and HT was disabled all
> > along, then the update to the ACPI Multi kernel would be needed.
>
> I know, it doesn't make sense.
>
> All I can say it that in the past, when this happened to
> some other users, HT was turned OFF in the BIOS, and
> when it was turned ON, and XP was reinstalled, all was well.
>
> Go figure. Perhaps a mgfr.-specific BIOS issue.
>
> >
> > --
> > spam999free@rrohio.com
> > remove 999 in order to email me
> >
>
>
>
 
Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Leythos <void@nowhere.lan> wrote in
news:HZLbe.781$Eg.23@tornado.ohiordc.rr.com:

> What we need is someone using XP Prof and running Dual Xeon CPU's to tell
> us what they see.

Win XP Pro SP1 definitively supports 4 logical CPUs but I'm interested if
it supports 8 logical CPUs because the new Xeon Doublecore CPUs with
hypertrhreading will have 4 logical CPU pro physical CPU ...

--
cu
o.pfeiffer

ICQ# 84320006
eMail oliver.pfeiffer@gmx.net
--------------------------------------------
TECHNOLOGIE - ZENTRUM INFORMATIK / UNIVERSITAET BREMEN / GERMANY
 
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