Currently I have a P4 2.26GHz CPU, I'm about to upgrade to a P4 3.06 GHz
(with hyperthreading). Will I have to reinstall Windows XP in order to enable
hyperthreading? I've heard a million different stories about this, but I'd
like a definitive answer.

You need a motherboard that supports hyperthreading, a CPU
that supports hyperthreading, an operating system (Windows
XP-Home or Pro) and software applications that support
hyperthreading. Intel has all the details on their web
site. www.intel.com search for hyperthreading on homepage
and these are the first of thousands of hits


Searched for hyperthreading Results 1 - 10
of about 3,970 Search took 0.14 seconds.


You could also try: Hyper-Threading

Intel Corporation Hyper-Threading Technology
System Requirements
... Products Hyper-Threading Technology. ...
Hyper-Threading Technology
requires a computer system with the following:
....
www.intel.com/info/hyperthreading/ - 37k

The Intel® Pentium® 4 Processor with HT
Technology ...

www.intel.com/homepage/land/hyperthreading.htm -
2k - 9/29/2003

Integration Overview for Systems Based on the
Intel® Pentium ...
... specific hardware and software you use. See
www.intel.com/info/hyperthreading for
more information including details on which
processors support HT Technology ...
http://www.intel.com/cd/channel/rese...ox_processors/...
- 91k

Intel® Pentium® 4 Processor with HT Technology
... hardware and software you use. See
http://www.intel.com/info/hyperthreading/ for
more information, including details on which
processors support HT Technology. ...
http://www.intel.com/business/bss/pr...ading/desktop/
- 49k




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But government sees it as an obstacle to be overcome.




"Dean" <(E-Mail Removed)> wrote in message
news:ECF74364-4639-46EB-90BD-(E-Mail Removed)...
| Currently I have a P4 2.26GHz CPU, I'm about to upgrade to
a P4 3.06 GHz
| (with hyperthreading). Will I have to reinstall Windows XP
in order to enable
| hyperthreading? I've heard a million different stories
about this, but I'd
| like a definitive answer.

Here is the simple answer:

If you are just replacing the P4 2.25GHz CPU with the 3.06GHz, then you
might not have to re-install. However, you may not get HT working.

If you have to replace the motherboard, when changing to the 3.06GHz, then
YES, you will have to re-install. Also, if you have an OEM version of XP,
then you will need to buy another copy of XP for the re-install. OEM
versions are forever tied to the first motherboard/PC that the software gets
installed onto. As per the End-User License Agreement (EULA), OEM versions
can not be transferred.


"Dean" <(E-Mail Removed)> wrote in message
news:ECF74364-4639-46EB-90BD-(E-Mail Removed)...
> Currently I have a P4 2.26GHz CPU, I'm about to upgrade to a P4 3.06 GHz
> (with hyperthreading). Will I have to reinstall Windows XP in order to
> enable
> hyperthreading? I've heard a million different stories about this, but I'd
> like a definitive answer.

Well, I just did this (moved from 2.06GHz to 3.2GHz 800fsb 1MB C2 cache),
but I had to change motherboards too (875 to 865 as the 875 did not support
the 1MB cache). I did NOT have to reinstall the OS, but it was NOT an OEM
install (it was installed from MSDN Universal). I DID have to reactivate
though. My IBM laptop also went through a motherboard/CPU change with the
same hard drive image and I just had to reregister. In this case it WAS an
OEM install version (at least I think so).

--
____________________________________
William (Bill) Vaughn
Author, Mentor, Consultant
Microsoft MVP
www.betav.com
Please reply only to the newsgroup so that others can benefit.
This posting is provided "AS IS" with no warranties, and confers no rights.
__________________________________

"Yves Leclerc" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Here is the simple answer:
>
> If you are just replacing the P4 2.25GHz CPU with the 3.06GHz, then you
> might not have to re-install. However, you may not get HT working.
>
> If you have to replace the motherboard, when changing to the 3.06GHz, then
> YES, you will have to re-install. Also, if you have an OEM version of XP,
> then you will need to buy another copy of XP for the re-install. OEM
> versions are forever tied to the first motherboard/PC that the software
> gets installed onto. As per the End-User License Agreement (EULA), OEM
> versions can not be transferred.
>
>
> "Dean" <(E-Mail Removed)> wrote in message
> news:ECF74364-4639-46EB-90BD-(E-Mail Removed)...
>> Currently I have a P4 2.26GHz CPU, I'm about to upgrade to a P4 3.06 GHz
>> (with hyperthreading). Will I have to reinstall Windows XP in order to
>> enable
>> hyperthreading? I've heard a million different stories about this, but
>> I'd
>> like a definitive answer.
>
>

Bill, I'm sure that you had to perform a repair install to set XP to the new
CPU / Mobo combination. This would also prompt for the re-activation process
after installation was finished.

Generally IBM and other laptops with their OEM versions of XP will not
require activation [just part of the way their versions are configured]. It
is impossible to use the installation CD on anything other than the same
family of computer!

In all cases REGISTRATION is not mandatory; only ACTIVATION is required when
installing XP and other Microsoft products. Registration is where one
provides their personal information across to Microsoft for the purposes of
receiving support or written communications regarding the product.
Activation is a part of the Microsoft copyright protection and anti piracy
features.

Once registered, as a user of course it isn't necessary to reregister every
time one reinstalls Windows. Activation is to be expected each time Windows
is installed [initial instance, a repair install or when a PC is rebuilt and
Windows is loaded onto a clean hard drive etc..].


"William (Bill) Vaughn" wrote:

> Well, I just did this (moved from 2.06GHz to 3.2GHz 800fsb 1MB C2 cache),
> but I had to change motherboards too (875 to 865 as the 875 did not support
> the 1MB cache). I did NOT have to reinstall the OS, but it was NOT an OEM
> install (it was installed from MSDN Universal). I DID have to reactivate
> though. My IBM laptop also went through a motherboard/CPU change with the
> same hard drive image and I just had to reregister. In this case it WAS an
> OEM install version (at least I think so).
>
> --
> ____________________________________
> William (Bill) Vaughn
> Author, Mentor, Consultant
> Microsoft MVP
> www.betav.com
> Please reply only to the newsgroup so that others can benefit.
> This posting is provided "AS IS" with no warranties, and confers no rights.
> __________________________________
>
> "Yves Leclerc" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > Here is the simple answer:
> >
> > If you are just replacing the P4 2.25GHz CPU with the 3.06GHz, then you
> > might not have to re-install. However, you may not get HT working.
> >
> > If you have to replace the motherboard, when changing to the 3.06GHz, then
> > YES, you will have to re-install. Also, if you have an OEM version of XP,
> > then you will need to buy another copy of XP for the re-install. OEM
> > versions are forever tied to the first motherboard/PC that the software
> > gets installed onto. As per the End-User License Agreement (EULA), OEM
> > versions can not be transferred.
> >
> >
> > "Dean" <(E-Mail Removed)> wrote in message
> > news:ECF74364-4639-46EB-90BD-(E-Mail Removed)...
> >> Currently I have a P4 2.26GHz CPU, I'm about to upgrade to a P4 3.06 GHz
> >> (with hyperthreading). Will I have to reinstall Windows XP in order to
> >> enable
> >> hyperthreading? I've heard a million different stories about this, but
> >> I'd
> >> like a definitive answer.
> >
> >
>
>
>

Laptops motherboard are unique and are mostly replaced by the manufacturer.
Then, the manufacturer may have the permission to "transfer" the OEM XP.


"BAR" <(E-Mail Removed)> wrote in message
news:3BB505F5-B658-4988-8BE1-(E-Mail Removed)...
> Bill, I'm sure that you had to perform a repair install to set XP to the
> new
> CPU / Mobo combination. This would also prompt for the re-activation
> process
> after installation was finished.
>
> Generally IBM and other laptops with their OEM versions of XP will not
> require activation [just part of the way their versions are configured].
> It
> is impossible to use the installation CD on anything other than the same
> family of computer!
>
> In all cases REGISTRATION is not mandatory; only ACTIVATION is required
> when
> installing XP and other Microsoft products. Registration is where one
> provides their personal information across to Microsoft for the purposes
> of
> receiving support or written communications regarding the product.
> Activation is a part of the Microsoft copyright protection and anti piracy
> features.
>
> Once registered, as a user of course it isn't necessary to reregister
> every
> time one reinstalls Windows. Activation is to be expected each time
> Windows
> is installed [initial instance, a repair install or when a PC is rebuilt
> and
> Windows is loaded onto a clean hard drive etc..].
>
>
> "William (Bill) Vaughn" wrote:
>
>> Well, I just did this (moved from 2.06GHz to 3.2GHz 800fsb 1MB C2 cache),
>> but I had to change motherboards too (875 to 865 as the 875 did not
>> support
>> the 1MB cache). I did NOT have to reinstall the OS, but it was NOT an OEM
>> install (it was installed from MSDN Universal). I DID have to reactivate
>> though. My IBM laptop also went through a motherboard/CPU change with the
>> same hard drive image and I just had to reregister. In this case it WAS
>> an
>> OEM install version (at least I think so).
>>
>> --
>> ____________________________________
>> William (Bill) Vaughn
>> Author, Mentor, Consultant
>> Microsoft MVP
>> www.betav.com
>> Please reply only to the newsgroup so that others can benefit.
>> This posting is provided "AS IS" with no warranties, and confers no
>> rights.
>> __________________________________
>>
>> "Yves Leclerc" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed)...
>> > Here is the simple answer:
>> >
>> > If you are just replacing the P4 2.25GHz CPU with the 3.06GHz, then you
>> > might not have to re-install. However, you may not get HT working.
>> >
>> > If you have to replace the motherboard, when changing to the 3.06GHz,
>> > then
>> > YES, you will have to re-install. Also, if you have an OEM version of
>> > XP,
>> > then you will need to buy another copy of XP for the re-install. OEM
>> > versions are forever tied to the first motherboard/PC that the software
>> > gets installed onto. As per the End-User License Agreement (EULA), OEM
>> > versions can not be transferred.
>> >
>> >
>> > "Dean" <(E-Mail Removed)> wrote in message
>> > news:ECF74364-4639-46EB-90BD-(E-Mail Removed)...
>> >> Currently I have a P4 2.26GHz CPU, I'm about to upgrade to a P4 3.06
>> >> GHz
>> >> (with hyperthreading). Will I have to reinstall Windows XP in order to
>> >> enable
>> >> hyperthreading? I've heard a million different stories about this, but
>> >> I'd
>> >> like a definitive answer.
>> >
>> >
>>
>>
>>