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Does upgrading to a HyperThreaded CPU require a reinstall of Windo

Discussion in 'Windows XP' started by cement_head, Feb 14, 2010.

  1. cement_head

    cement_head Flightless Bird

    Hello,

    I have a P4 2.4 GHz non-HyperThreaded CPU on a machine running WindowsXP
    (SP3; all updates). I am planning on putting in a 3.06 GHz HyperThreaded CPU
    into the machine (all other hardware will remain identical).

    I have read that to maximise usuage of the HT CPU, I should re-install
    WindowsXP to have the MicroSoft WindowsXP Pro SP3 install the proper
    multithreading kernel.

    Is this true? Or can I just put the CPU in and reboot? Or...Although the
    current install wil recognise the HT CPU, to truly maximise the usuage of it,
    I should in fact do a fresh install so that the multithreading kernel will be
    promperly complied on install?

    Any suggestions would be helpful.

    Thanks,
    CH
     
  2. Rich Barry

    Rich Barry Flightless Bird

    Ch, I think you are getting WinXP and Linux mixed up.

    http://support.microsoft.com/kb/810231





    "cement_head" <cement_head@discussions.microsoft.com> wrote in message
    news:52C259A6-A0A2-4E63-B11B-5BBC9DA57824@microsoft.com...
    > Hello,
    >
    > I have a P4 2.4 GHz non-HyperThreaded CPU on a machine running WindowsXP
    > (SP3; all updates). I am planning on putting in a 3.06 GHz HyperThreaded
    > CPU
    > into the machine (all other hardware will remain identical).
    >
    > I have read that to maximise usuage of the HT CPU, I should re-install
    > WindowsXP to have the MicroSoft WindowsXP Pro SP3 install the proper
    > multithreading kernel.
    >
    > Is this true? Or can I just put the CPU in and reboot? Or...Although the
    > current install wil recognise the HT CPU, to truly maximise the usuage of
    > it,
    > I should in fact do a fresh install so that the multithreading kernel will
    > be
    > promperly complied on install?
    >
    > Any suggestions would be helpful.
    >
    > Thanks,
    > CH
     
  3. philo

    philo Flightless Bird

    Re: Does upgrading to a HyperThreaded CPU require a reinstall ofWindo

    cement_head wrote:
    > Hello,
    >
    > I have a P4 2.4 GHz non-HyperThreaded CPU on a machine running WindowsXP
    > (SP3; all updates). I am planning on putting in a 3.06 GHz HyperThreaded CPU
    > into the machine (all other hardware will remain identical).
    >
    > I have read that to maximise usuage of the HT CPU, I should re-install
    > WindowsXP to have the MicroSoft WindowsXP Pro SP3 install the proper
    > multithreading kernel.
    >
    > Is this true? Or can I just put the CPU in and reboot? Or...Although the
    > current install wil recognise the HT CPU, to truly maximise the usuage of it,
    > I should in fact do a fresh install so that the multithreading kernel will be
    > promperly complied on install?
    >
    > Any suggestions would be helpful.
    >
    > Thanks,
    > CH




    No need to perform a fresh install.

    Just boot up then have a look in the control panel
    and see how the CPU is detected


    Chances are it will be automatically detected...but
    If the new one is not picked up properly
    just update the drivers as you would any other component

    they are of course already built in to Windows


    I've done it many times when upgrading machines from single to dual
    cpu's etc
     
  4. Paul

    Paul Flightless Bird

    Re: Does upgrading to a HyperThreaded CPU require a reinstall ofWindo

    cement_head wrote:
    > Hello,
    >
    > I have a P4 2.4 GHz non-HyperThreaded CPU on a machine running WindowsXP
    > (SP3; all updates). I am planning on putting in a 3.06 GHz HyperThreaded CPU
    > into the machine (all other hardware will remain identical).
    >
    > I have read that to maximise usuage of the HT CPU, I should re-install
    > WindowsXP to have the MicroSoft WindowsXP Pro SP3 install the proper
    > multithreading kernel.
    >
    > Is this true? Or can I just put the CPU in and reboot? Or...Although the
    > current install wil recognise the HT CPU, to truly maximise the usuage of it,
    > I should in fact do a fresh install so that the multithreading kernel will be
    > promperly complied on install?
    >
    > Any suggestions would be helpful.
    >
    > Thanks,
    > CH


    You can change the HAL, via the "Computer" entry in Device Manager.

    For example, if you had a single core processor, the "Computer" entry in
    Device Manager should say "ACPI Uniprocessor PC". Changing the driver
    to using "ACPI Multiprocessor PC", changes the HAL (hardware abstraction layer)
    to handling multiprocessor cases. That involves a different set of files,
    which are already on your C: drive somewhere. You could make that
    change, after the new processor is installed, and Hyperthreading is
    enabled in the BIOS.

    "HAL options after Windows XP or Windows Server 2003 Setup"

    http://support.microsoft.com/kb/309283

    (Some of the files involved are mentioned on this page)

    http://support.microsoft.com/kb/237556

    Some HAL changes are easy, such as the one described above. If
    the "Computer" entry had a name of "Standard PC", you'd be in for
    a lot more trouble, but you'd already have hints of that,
    because of the lack of power management features (no soft-off).

    Paul
     
  5. John John - MVP

    John John - MVP Flightless Bird

    Re: Does upgrading to a HyperThreaded CPU require a reinstall ofWindo

    cement_head wrote:
    > Hello,
    >
    > I have a P4 2.4 GHz non-HyperThreaded CPU on a machine running WindowsXP
    > (SP3; all updates). I am planning on putting in a 3.06 GHz HyperThreaded CPU
    > into the machine (all other hardware will remain identical).
    >
    > I have read that to maximise usuage of the HT CPU, I should re-install
    > WindowsXP to have the MicroSoft WindowsXP Pro SP3 install the proper
    > multithreading kernel.
    >
    > Is this true? Or can I just put the CPU in and reboot? Or...Although the
    > current install wil recognise the HT CPU, to truly maximise the usuage of it,
    > I should in fact do a fresh install so that the multithreading kernel will be
    > promperly complied on install?
    >
    > Any suggestions would be helpful.


    All you need to do is enable Hyper-Threading in the BIOS and Windows XP
    will recognize it without you needing to do anything else.

    Certainly none of my business but I have to ask what do you intend to
    gain performance wise by doing this upgrade? With all due respect I
    submit to you that at best the gains (if any) will be negligible and
    that at worse your machine might be slower and that you may end up
    disabling HT to improve performance of the machine! Unless a particular
    application vendor instructed you to do this to improve performance with
    their application this upgrade is probably just a waste of time and money.

    John
     
  6. cement_head

    cement_head Flightless Bird

    Re: Does upgrading to a HyperThreaded CPU require a reinstall of W

    Thanks Guys, that answers my question.

    Cheers,
    CH

    "John John - MVP" wrote:

    > cement_head wrote:
    > > Hello,
    > >
    > > I have a P4 2.4 GHz non-HyperThreaded CPU on a machine running WindowsXP
    > > (SP3; all updates). I am planning on putting in a 3.06 GHz HyperThreaded CPU
    > > into the machine (all other hardware will remain identical).
    > >
    > > I have read that to maximise usuage of the HT CPU, I should re-install
    > > WindowsXP to have the MicroSoft WindowsXP Pro SP3 install the proper
    > > multithreading kernel.
    > >
    > > Is this true? Or can I just put the CPU in and reboot? Or...Although the
    > > current install wil recognise the HT CPU, to truly maximise the usuage of it,
    > > I should in fact do a fresh install so that the multithreading kernel will be
    > > promperly complied on install?
    > >
    > > Any suggestions would be helpful.

    >
    > All you need to do is enable Hyper-Threading in the BIOS and Windows XP
    > will recognize it without you needing to do anything else.
    >
    > Certainly none of my business but I have to ask what do you intend to
    > gain performance wise by doing this upgrade? With all due respect I
    > submit to you that at best the gains (if any) will be negligible and
    > that at worse your machine might be slower and that you may end up
    > disabling HT to improve performance of the machine! Unless a particular
    > application vendor instructed you to do this to improve performance with
    > their application this upgrade is probably just a waste of time and money.
    >
    > John
    > .
    >
     
  7. cement_head

    cement_head Flightless Bird

    Re: Does upgrading to a HyperThreaded CPU require a reinstall of W

    Multi-threading, multitasking, video processing, gaming, and being able to do
    heavey computational loads and still being able to access my system.

    "John John - MVP" wrote:

    > cement_head wrote:
    > > Hello,
    > >
    > > I have a P4 2.4 GHz non-HyperThreaded CPU on a machine running WindowsXP
    > > (SP3; all updates). I am planning on putting in a 3.06 GHz HyperThreaded CPU
    > > into the machine (all other hardware will remain identical).
    > >
    > > I have read that to maximise usuage of the HT CPU, I should re-install
    > > WindowsXP to have the MicroSoft WindowsXP Pro SP3 install the proper
    > > multithreading kernel.
    > >
    > > Is this true? Or can I just put the CPU in and reboot? Or...Although the
    > > current install wil recognise the HT CPU, to truly maximise the usuage of it,
    > > I should in fact do a fresh install so that the multithreading kernel will be
    > > promperly complied on install?
    > >
    > > Any suggestions would be helpful.

    >
    > All you need to do is enable Hyper-Threading in the BIOS and Windows XP
    > will recognize it without you needing to do anything else.
    >
    > Certainly none of my business but I have to ask what do you intend to
    > gain performance wise by doing this upgrade? With all due respect I
    > submit to you that at best the gains (if any) will be negligible and
    > that at worse your machine might be slower and that you may end up
    > disabling HT to improve performance of the machine! Unless a particular
    > application vendor instructed you to do this to improve performance with
    > their application this upgrade is probably just a waste of time and money.
    >
    > John
    > .
    >
     
  8. Bob I

    Bob I Flightless Bird

    Re: Does upgrading to a HyperThreaded CPU require a reinstall ofW

    Unfortunately the only part of HyperThreading that that was effective in
    the real world was the "Hype". In controlled bench marking using
    software that was designed to take advantage of that feature they could
    improve performance by 25%. Real world use shows otherwise.

    http://www.pcworld.com/article/107492/two_cpus_in_one.html

    So go ahead and plug the new chip. The jump from 2.4 to 3.0 will get you
    a nice bump. Toggle HT off if you don't see a performance increase.


    cement_head wrote:

    > Multi-threading, multitasking, video processing, gaming, and being able to do
    > heavey computational loads and still being able to access my system.
    >
    > "John John - MVP" wrote:
    >
    >
    >>cement_head wrote:
    >>
    >>>Hello,
    >>>
    >>> I have a P4 2.4 GHz non-HyperThreaded CPU on a machine running WindowsXP
    >>>(SP3; all updates). I am planning on putting in a 3.06 GHz HyperThreaded CPU
    >>>into the machine (all other hardware will remain identical).
    >>>
    >>>I have read that to maximise usuage of the HT CPU, I should re-install
    >>>WindowsXP to have the MicroSoft WindowsXP Pro SP3 install the proper
    >>>multithreading kernel.
    >>>
    >>>Is this true? Or can I just put the CPU in and reboot? Or...Although the
    >>>current install wil recognise the HT CPU, to truly maximise the usuage of it,
    >>>I should in fact do a fresh install so that the multithreading kernel will be
    >>>promperly complied on install?
    >>>
    >>>Any suggestions would be helpful.

    >>
    >>All you need to do is enable Hyper-Threading in the BIOS and Windows XP
    >>will recognize it without you needing to do anything else.
    >>
    >>Certainly none of my business but I have to ask what do you intend to
    >>gain performance wise by doing this upgrade? With all due respect I
    >>submit to you that at best the gains (if any) will be negligible and
    >>that at worse your machine might be slower and that you may end up
    >>disabling HT to improve performance of the machine! Unless a particular
    >>application vendor instructed you to do this to improve performance with
    >>their application this upgrade is probably just a waste of time and money.
    >>
    >>John
    >>.
    >>
     

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