Quad Core Limitations

I have heard that even though Vista & XP support Quad-core they can't
utilize all 4 cores but only 2 in the OS (I am not talking about apps
just the OS) is that true. Also i am not talking about slots i am
talking about 1 slot with 1 Quad-Core CPU, with Vista or XP Pro does it
use all 4 thread in its OS operations? thanks

Justin

"Justin" <> wrote in message
news:...
>I have heard that even though Vista & XP support Quad-core they can't
>utilize all 4 cores but only 2 in the OS (I am not talking about apps just
>the OS) is that true. Also i am not talking about slots i am talking about
>1 slot with 1 Quad-Core CPU, with Vista or XP Pro does it use all 4 thread
>in its OS operations? thanks
>
> Justin


No such limitation exists in the named Operating Systems.


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I have a meter that tells me all four cores are being used. Whe
testing the cpu with benchmarking all four go up so they are all in use

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XP Pro does not switch to other cores as well as Vista does. I run a
pair of quad core Xeons for 8 cores. I see activity across all 8 cores
in Vista x64 Ultimate. I am looking for a benchmarking tool that can
hit all 8 cores and test them.


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SCSIraidGURU

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pair of Intel E5430 quad core 2.66 GHz Xeons
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SCSIraidGURU wrote:
> XP Pro does not switch to other cores as well as Vista does. I run a
> pair of quad core Xeons for 8 cores. I see activity across all 8 cores
> in Vista x64 Ultimate. I am looking for a benchmarking tool that can
> hit all 8 cores and test them.
>
>
Thanks i just wanted confirmation, what you guys said i thought was
right, and when i googled it i couldn't find anything supporting the 2
core only argument.

So you are saying there is also no performance limitation with vista,
correct? In-other-word Vista & XP utilize 100% of each core for a quad
core as they would a dual or single core?

An example of what i am talking about is hyper threading, how intel
introduced hyper threading because there was a limitation in the CPU
that they couldn't utilize the 100% of it so HT was used to take full
advantage of the CPU.

Neither Windows XP nor Vista have a "core" limitation, they have a "physical
processor" limitation. As long as one physical processor is installed,
Windows XP and Vista will happily use whatever number of cores it supports.

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"Justin" <> wrote in message
news:...
>I have heard that even though Vista & XP support Quad-core they can't
>utilize all 4 cores but only 2 in the OS (I am not talking about apps just
>the OS) is that true. Also i am not talking about slots i am talking about
>1 slot with 1 Quad-Core CPU, with Vista or XP Pro does it use all 4 thread
>in its OS operations? thanks
>
> Justin

Justin wrote:
> SCSIraidGURU wrote:
>> XP Pro does not switch to other cores as well as Vista does. I run a
>> pair of quad core Xeons for 8 cores. I see activity across all 8 cores
>> in Vista x64 Ultimate. I am looking for a benchmarking tool that can
>> hit all 8 cores and test them.
>>
>>
> Thanks i just wanted confirmation, what you guys said i thought was
> right, and when i googled it i couldn't find anything supporting the 2
> core only argument.
>
> So you are saying there is also no performance limitation with vista,
> correct? In-other-word Vista & XP utilize 100% of each core for a quad
> core as they would a dual or single core?
>
> An example of what i am talking about is hyper threading, how intel
> introduced hyper threading because there was a limitation in the CPU
> that they couldn't utilize the 100% of it so HT was used to take full
> advantage of the CPU.

XP and Vista can handle 4 cores with no problem...

XP is always faster on any kind of hardware than vista(the worst
operation system ever made by microsoft)

the only limitation is for 2 PHYSICAL CPU CHIPS,
however each one of these 2 chips can have as many cores as possible

thus you can have a motherboard that has 2 cpu sockets maximum, but each
cpu can have 4+ cores

oh.. almost forgot to explain to you that frank is stupid...

if you bump into him please call him a moron!

thanks

Justin wrote:
> I have heard that even though Vista & XP support Quad-core they can't
> utilize all 4 cores but only 2 in the OS (I am not talking about apps
> just the OS) is that true. Also i am not talking about slots i am
> talking about 1 slot with 1 Quad-Core CPU, with Vista or XP Pro does it
> use all 4 thread in its OS operations? thanks
>
> Justin


XP and Vista can handle 4 cores with no problem...

XP is always faster on any kind of hardware than vista(the worst
operation system ever made by microsoft)

the only limitation is for 2 PHYSICAL CPU CHIPS,
however each one of these 2 chips can have as many cores as possible

thus you can have a motherboard that has 2 cpu sockets maximum, but each
cpu can have 4+ cores

oh.. almost forgot to explain to you that frank is stupid...

if you bump into him please call him a moron!

thanks

F Oh'Ff vist- A wrote:

> Justin wrote:
>
>> I have heard that even though Vista & XP support Quad-core they can't
>> utilize all 4 cores but only 2 in the OS (I am not talking about apps
>> just the OS) is that true. Also i am not talking about slots i am
>> talking about 1 slot with 1 Quad-Core CPU, with Vista or XP Pro does
>> it use all 4 thread in its OS operations? thanks
>>
>> Justin
>
>
>
> XP and Vista can handle 4 cores with no problem...

Duh!
>
> XP is always faster on any kind of hardware than vista(the worst
> operation system ever made by microsoft)

Liar!
>
> the only limitation is for 2 PHYSICAL CPU CHIPS,
> however each one of these 2 chips can have as many cores as possible

Well duh!
>
> thus you can have a motherboard that has 2 cpu sockets maximum, but each
> cpu can have 4+ cores

Are you just now figuring all of this out?
>
> oh.. almost forgot to explain to you that frank is stupid...

I've known this forever. In fact we use to run a slew of dual processor
work stations back in the 90's.

if you bump into him please call him a moron!

Hey guess what capin' crunch...Vista has completely destroyed you...and
it was soooo easy!...LOL!

On Fri, 18 Jul 2008 03:26:47 +0300, F Oh'Ff vist- A <>
wrote:

> the only limitation is for 2 PHYSICAL CPU CHIPS,


That's correct in Business, Enterprise, and Ultimate.

Home Basic and Home Premium are both limited to a single CPU.


> however each one of these 2 chips can have as many cores as possible


Correct, in all versions.

--
Ken Blake, Microsoft MVP - Windows Desktop Experience
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