Does XP PRO 64 support 2 x dual core processors?

As per Microsofts: 5 reasons to go windows x64.

Under the sub heading: Multiprocessing and Multicore.
"Windows Xp Professional x64 Edition is designed to support up to two single
or multicore x64 processors for maximum performance and scalability."

Is this correct ? As I have read in the media that in Windows Server 2003
x64 the windows task manager will detect 4 CPUs (2 x Dual Core) as will the
bios. Is this only particular to Windows Server 64 as a Windows white paper
on x64 states that XP PRO x64 can only support 2 CPUs . Does XP PRO x64 deal
with multicore in a different way?
I would like to put together a 2 x Dual Core Opteron workstaion with XP PRO
x64 but it would be great if someone could clarify this bit of confusion for
me.

Many thanks.. Mark

M
Fri Jul 01 06:58:21 CDT 2005

Yes. 2 dual cores will look like 4 cpus. This got started when Intel
brought about hyperthreading, and MS said for licensing purposes they would
count sockets, not cores or apparent cores.

"Mark" <Mark@discussions.microsoft.com> wrote in message
news:D7E67059-ED28-4E79-8640-B0951418B1FA@microsoft.com...
> As per Microsofts: 5 reasons to go windows x64.
>
> Under the sub heading: Multiprocessing and Multicore.
> "Windows Xp Professional x64 Edition is designed to support up to two
> single
> or multicore x64 processors for maximum performance and scalability."
>
> Is this correct ? As I have read in the media that in Windows Server 2003
> x64 the windows task manager will detect 4 CPUs (2 x Dual Core) as will
> the
> bios. Is this only particular to Windows Server 64 as a Windows white
> paper
> on x64 states that XP PRO x64 can only support 2 CPUs . Does XP PRO x64
> deal
> with multicore in a different way?
> I would like to put together a 2 x Dual Core Opteron workstaion with XP
> PRO
> x64 but it would be great if someone could clarify this bit of confusion
> for
> me.
>
> Many thanks.. Mark

Mark
Fri Jul 01 08:50:03 CDT 2005

Thank you M.
Can I just clarify that by Yes (full stop) you mean XP x64 will suppot 2
dual cores.

"M. Murcek" wrote:

> Yes. 2 dual cores will look like 4 cpus. This got started when Intel
> brought about hyperthreading, and MS said for licensing purposes they would
> count sockets, not cores or apparent cores.
>
> "Mark" <Mark@discussions.microsoft.com> wrote in message
> news:D7E67059-ED28-4E79-8640-B0951418B1FA@microsoft.com...
> > As per Microsofts: 5 reasons to go windows x64.
> >
> > Under the sub heading: Multiprocessing and Multicore.
> > "Windows Xp Professional x64 Edition is designed to support up to two
> > single
> > or multicore x64 processors for maximum performance and scalability."
> >
> > Is this correct ? As I have read in the media that in Windows Server 2003
> > x64 the windows task manager will detect 4 CPUs (2 x Dual Core) as will
> > the
> > bios. Is this only particular to Windows Server 64 as a Windows white
> > paper
> > on x64 states that XP PRO x64 can only support 2 CPUs . Does XP PRO x64
> > deal
> > with multicore in a different way?
> > I would like to put together a 2 x Dual Core Opteron workstaion with XP
> > PRO
> > x64 but it would be great if someone could clarify this bit of confusion
> > for
> > me.
> >
> > Many thanks.. Mark
>
>
>

Thomas
Fri Jul 01 09:10:25 CDT 2005

M. Murcek wrote:

> Yes. 2 dual cores will look like 4 cpus.

And 8 with HT enabled.

--
Regards
Madsen

Mike
Fri Jul 01 09:47:32 CDT 2005

"Mark" <Mark@discussions.microsoft.com> wrote in message
news:189B8D6C-730B-46B3-B93D-8C4B352404EE@microsoft.com...
> Thank you M.
> Can I just clarify that by Yes (full stop) you mean XP x64 will suppot 2
> dual cores.

Yes Windows XP Professional x64 Edition supports 2 CPU SOCKETS - so either
single or dual cores with or without hyperthreading
We only count sockets
--

Regards,

Mike
--
Mike Brannigan [Microsoft]

This posting is provided "AS IS" with no warranties, and confers no
rights

Please note I cannot respond to e-mailed questions, please use these
newsgroups

"Mark" <Mark@discussions.microsoft.com> wrote in message
news:189B8D6C-730B-46B3-B93D-8C4B352404EE@microsoft.com...
> Thank you M.
> Can I just clarify that by Yes (full stop) you mean XP x64 will suppot 2
> dual cores.
>
> "M. Murcek" wrote:
>
>> Yes. 2 dual cores will look like 4 cpus. This got started when Intel
>> brought about hyperthreading, and MS said for licensing purposes they
>> would
>> count sockets, not cores or apparent cores.
>>
>> "Mark" <Mark@discussions.microsoft.com> wrote in message
>> news:D7E67059-ED28-4E79-8640-B0951418B1FA@microsoft.com...
>> > As per Microsofts: 5 reasons to go windows x64.
>> >
>> > Under the sub heading: Multiprocessing and Multicore.
>> > "Windows Xp Professional x64 Edition is designed to support up to two
>> > single
>> > or multicore x64 processors for maximum performance and scalability."
>> >
>> > Is this correct ? As I have read in the media that in Windows Server
>> > 2003
>> > x64 the windows task manager will detect 4 CPUs (2 x Dual Core) as will
>> > the
>> > bios. Is this only particular to Windows Server 64 as a Windows white
>> > paper
>> > on x64 states that XP PRO x64 can only support 2 CPUs . Does XP PRO x64
>> > deal
>> > with multicore in a different way?
>> > I would like to put together a 2 x Dual Core Opteron workstaion with
>> > XP
>> > PRO
>> > x64 but it would be great if someone could clarify this bit of
>> > confusion
>> > for
>> > me.
>> >
>> > Many thanks.. Mark
>>
>>
>>

Andre
Fri Jul 01 10:15:12 CDT 2005

Here is a great article about it by Charlie Russel:
http://msmvps.com/xperts64/archive/2005/06/27/56138.aspx
--
Andre
Extended64 | http://www.extended64.com
Blog | http://www.extended64.com/blogs/andre
http://spaces.msn.com/members/adacosta
FAQ for MS AntiSpy http://www.geocities.com/marfer_mvp/FAQ_MSantispy.htm

"Mark" <Mark@discussions.microsoft.com> wrote in message
news:D7E67059-ED28-4E79-8640-B0951418B1FA@microsoft.com...
> As per Microsofts: 5 reasons to go windows x64.
>
> Under the sub heading: Multiprocessing and Multicore.
> "Windows Xp Professional x64 Edition is designed to support up to two
> single
> or multicore x64 processors for maximum performance and scalability."
>
> Is this correct ? As I have read in the media that in Windows Server 2003
> x64 the windows task manager will detect 4 CPUs (2 x Dual Core) as will
> the
> bios. Is this only particular to Windows Server 64 as a Windows white
> paper
> on x64 states that XP PRO x64 can only support 2 CPUs . Does XP PRO x64
> deal
> with multicore in a different way?
> I would like to put together a 2 x Dual Core Opteron workstaion with XP
> PRO
> x64 but it would be great if someone could clarify this bit of confusion
> for
> me.
>
> Many thanks.. Mark

Mark
Fri Jul 01 10:55:02 CDT 2005

Thank you all for your help.

Mark

"Mark" wrote:

> As per Microsofts: 5 reasons to go windows x64.
>
> Under the sub heading: Multiprocessing and Multicore.
> "Windows Xp Professional x64 Edition is designed to support up to two single
> or multicore x64 processors for maximum performance and scalability."
>
> Is this correct ? As I have read in the media that in Windows Server 2003
> x64 the windows task manager will detect 4 CPUs (2 x Dual Core) as will the
> bios. Is this only particular to Windows Server 64 as a Windows white paper
> on x64 states that XP PRO x64 can only support 2 CPUs . Does XP PRO x64 deal
> with multicore in a different way?
> I would like to put together a 2 x Dual Core Opteron workstaion with XP PRO
> x64 but it would be great if someone could clarify this bit of confusion for
> me.
>
> Many thanks.. Mark

Charlie
Fri Jul 01 14:30:15 CDT 2005

yes, full stop, it will. See our blog -- I cover this exact question, just as
I did on this very newsgroup last week.

--
Charlie.
http://www.msmvps.com/xperts64/


Mark wrote:
> Thank you M.
> Can I just clarify that by Yes (full stop) you mean XP x64 will
> suppot 2 dual cores.
>
> "M. Murcek" wrote:
>
>> Yes. 2 dual cores will look like 4 cpus. This got started when Intel
>> brought about hyperthreading, and MS said for licensing purposes
>> they would count sockets, not cores or apparent cores.
>>
>> "Mark" <Mark@discussions.microsoft.com> wrote in message
>> news:D7E67059-ED28-4E79-8640-B0951418B1FA@microsoft.com...
>>> As per Microsofts: 5 reasons to go windows x64.
>>>
>>> Under the sub heading: Multiprocessing and Multicore.
>>> "Windows Xp Professional x64 Edition is designed to support up to
>>> two single
>>> or multicore x64 processors for maximum performance and
>>> scalability."
>>>
>>> Is this correct ? As I have read in the media that in Windows
>>> Server 2003 x64 the windows task manager will detect 4 CPUs (2 x
>>> Dual Core) as will the
>>> bios. Is this only particular to Windows Server 64 as a Windows
>>> white paper
>>> on x64 states that XP PRO x64 can only support 2 CPUs . Does XP PRO
>>> x64 deal
>>> with multicore in a different way?
>>> I would like to put together a 2 x Dual Core Opteron workstaion
>>> with XP PRO
>>> x64 but it would be great if someone could clarify this bit of
>>> confusion for
>>> me.
>>>
>>> Many thanks.. Mark

Charlie
Sat Jul 02 10:45:39 CDT 2005

Well, no, not exactly. It will _look_ like 8, but it won't be effectively 8,
since HT is not at all the same as a separate core.

--
Charlie.
http://www.msmvps.com/xperts64/


Thomas G. Madsen wrote:
> M. Murcek wrote:
>
>> Yes. 2 dual cores will look like 4 cpus.
>
> And 8 with HT enabled.

Thomas
Sat Jul 02 11:13:03 CDT 2005

Charlie Russel - MVP wrote:

> Well, no, not exactly. It will _look_ like 8, but it won't be
> effectively 8, since HT is not at all the same as a separate
> core.

True. What I meant is that it will _look_ like 8.

--
Regards
Madsen

Chris
Sat Jul 02 13:24:02 CDT 2005

As I did not see confirmation of quad-core processor support, just wondering
whether these overall limits are true for build 1830 :
PRO 8 concurrent threads
STD 16 concurrent threads
ENT 32 concurrent threads
DTC 256 concurrent threads

webfactor
Sun Jul 03 09:29:02 CDT 2005



"Chris" wrote:

> As I did not see confirmation of quad-core processor support, just wondering
> whether these overall limits are true for build 1830 :
> PRO 8 concurrent threads
> STD 16 concurrent threads
> ENT 32 concurrent threads
> DTC 256 concurrent threads
>
>
But x64 OEM editions only supports One processor and Dual or Hyper witch means
that one carry 2 cpu is not restricted so I guess that a dual motherboard 2
Processors will have to have 2 licences

Don
Sun Jul 03 09:57:22 CDT 2005

FYI I have a Dell Precision with 2 Xeon hyperthreaded CPUs and both are
supported, in hyperthread mode, under x64..


"webfactor" <webfactor@discussions.microsoft.com> wrote in message
news:5409CF38-DCFE-44F3-A64E-960F7D41B7EC@microsoft.com...
>
>
> "Chris" wrote:
>
>> As I did not see confirmation of quad-core processor support, just
>> wondering
>> whether these overall limits are true for build 1830 :
>> PRO 8 concurrent threads
>> STD 16 concurrent threads
>> ENT 32 concurrent threads
>> DTC 256 concurrent threads
>>
>>
> But x64 OEM editions only supports One processor and Dual or Hyper witch
> means
> that one carry 2 cpu is not restricted so I guess that a dual motherboard
> 2
> Processors will have to have 2 licences
>

NNBXX
Sun Jul 03 10:00:47 CDT 2005

Same here. Perfect.

"Don Awalt" <donawalt@removethisgmail.com> wrote in message
news:%23a6fF%239fFHA.2880@TK2MSFTNGP14.phx.gbl...
> FYI I have a Dell Precision with 2 Xeon hyperthreaded CPUs and both are
> supported, in hyperthread mode, under x64..
>
>
> "webfactor" <webfactor@discussions.microsoft.com> wrote in message
> news:5409CF38-DCFE-44F3-A64E-960F7D41B7EC@microsoft.com...
>>
>>
>> "Chris" wrote:
>>
>>> As I did not see confirmation of quad-core processor support, just
>>> wondering
>>> whether these overall limits are true for build 1830 :
>>> PRO 8 concurrent threads
>>> STD 16 concurrent threads
>>> ENT 32 concurrent threads
>>> DTC 256 concurrent threads
>>>
>>>
>> But x64 OEM editions only supports One processor and Dual or Hyper witch
>> means
>> that one carry 2 cpu is not restricted so I guess that a dual motherboard
>> 2
>> Processors will have to have 2 licences
>>
>
>

Mike
Sun Jul 03 10:43:55 CDT 2005

"webfactor" <webfactor@discussions.microsoft.com> wrote in message
news:5409CF38-DCFE-44F3-A64E-960F7D41B7EC@microsoft.com...
>
>
> "Chris" wrote:
>
>> As I did not see confirmation of quad-core processor support, just
>> wondering
>> whether these overall limits are true for build 1830 :
>> PRO 8 concurrent threads
>> STD 16 concurrent threads
>> ENT 32 concurrent threads
>> DTC 256 concurrent threads
>>
>>
> But x64 OEM editions only supports One processor and Dual or Hyper witch
> means
> that one carry 2 cpu is not restricted so I guess that a dual motherboard
> 2
> Processors will have to have 2 licences

Incorrect,

Windows XP Professional x64 Edition (which is Only available as an OEM
product) supports 2 CPU sockets as I have already answered,

--

Regards,

Mike
--
Mike Brannigan [Microsoft]

This posting is provided "AS IS" with no warranties, and confers no
rights

Please note I cannot respond to e-mailed questions, please use these
newsgroups

"webfactor" <webfactor@discussions.microsoft.com> wrote in message
news:5409CF38-DCFE-44F3-A64E-960F7D41B7EC@microsoft.com...
>
>
> "Chris" wrote:
>
>> As I did not see confirmation of quad-core processor support, just
>> wondering
>> whether these overall limits are true for build 1830 :
>> PRO 8 concurrent threads
>> STD 16 concurrent threads
>> ENT 32 concurrent threads
>> DTC 256 concurrent threads
>>
>>
> But x64 OEM editions only supports One processor and Dual or Hyper witch
> means
> that one carry 2 cpu is not restricted so I guess that a dual motherboard
> 2
> Processors will have to have 2 licences
>

Andre
Sun Jul 03 13:28:24 CDT 2005

2 sockets and thats it. If you want more, go up to Windows Server 2003 x64.
--
Andre
Extended64 | http://www.extended64.com
Blog | http://www.extended64.com/blogs/andre
http://spaces.msn.com/members/adacosta
FAQ for MS AntiSpy http://www.geocities.com/marfer_mvp/FAQ_MSantispy.htm

"Chris" <Chris@discussions.microsoft.com> wrote in message
news:06A27BF3-2CF3-495A-8D47-A100C30688F6@microsoft.com...
> As I did not see confirmation of quad-core processor support, just
> wondering
> whether these overall limits are true for build 1830 :
> PRO 8 concurrent threads
> STD 16 concurrent threads
> ENT 32 concurrent threads
> DTC 256 concurrent threads
>
>

webfactor
Sun Jul 03 17:21:02 CDT 2005