From owner-freebsd-questions@FreeBSD.ORG  Thu Jun 28 00:11:01 2007
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Date: Thu, 28 Jun 2007 01:10:57 +0100
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Subject: Re: Upgrading from an old athlon to a new 64 bit one.
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On Wed, 27 Jun 2007 14:54:52 -0500
eculp@unixmania.com wrote:

> I have just stuck the disks from an old AMD Athlon(tm)  (1333.39-MHz  
> 686-class CPU) into a new box with an AMD Athlon(tm) 64 Processor  
> 3800+ (2387.78-MHz 686-class CPU).  I am still building a daily
> kernel with the old configuration and all is well.  Of course the
> old configuration was/is i386.  Now I need to compile for 64 bit
> apps.  

Are you sure about that? there are few compelling reasons to go to
64-bit, if you already have a working system. As far as performance is
concerned, it may go either way.

> Right now all is
> working fine with todays, sources and kernel except they are compiled
> for Intel.

They are compiled for i386; Intel and AMD both produce CPUs for both
platforms.