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From: Michael Powell <nightrecon@verizon.net>
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Subject: Re: Which install ?
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Erik Trulsson wrote:

> On Mon, Mar 09, 2009 at 11:25:06AM -0500, Darryl Hoar wrote:
>> Greetings,
>> I just purchased an older rack mounted supermicro server.  It is running
>> CentOS, but I want to install Freebsd on it.
>> The server has (2) Xeon processors.  Which download should I use ?  i386
>> ???
>> 
> 
> If it is an older server then i386 is probably the right version to use.
> The recent processors from Intel that use the 'Xeon' name also support
> amd64, but older ones did not.
> 
> 
> 
> 

If memory serves, the first Xeon to be 64 bit was the Nocona. Xeons prior to 
that were 32 bit and came in OLGA 603 sockets. In early 2001 they were 1.4 
to 1.7GHz units, and later that year the speeds ramped up.

At any rate, dmesg works the same way in CentOS so you can use it to easily 
make a more accurate determination. It will be near the top so do dmesg |
more, or dmesg | less so it will page. It will be among some of the earliest 
output.

-Mike