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From: MikeS 
Newsgroups: microsoft.public.windowsxp.general
Subject: Re: Running XP on a 64bit processor computer
Date: Mon, 20 Nov 2017 22:41:35 +0000
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On 20/11/2017 21:59, james@nospam.com wrote:
> I have a computer which originally came witt Vista. It's a 64bit
> machine. I got it with XP Pro SP3 installed. I know that XP is 32bit.
> I'm a little puzzled about this. Can XP (or any 32bit OS) run on a
> computer that has a 64bit processor?
> 
> (I know you cant do it the other way. You cant run a 64 bit OS on a 32
> bit machine).
> 
> Does running a 32 bit OS on a 64bit machine work any better or worse
> than it does using an actual 32 bit computer?
> 
Yes provided you mean an x64 bit processor which is an extension of the 
32 bit architecture.
The advantage of using a 64 bit OS version (such as the final version of 
  Win XP - Pro 64 bit) was mainly a larger address space allowing > 4 GB 
RAM.
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