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Date: Thu, 05 Dec 2002 22:10:07 +0100
From: Stefan Smietanowski <stesmi@stesmi.com>
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To: Byron Albert <byron@markerman.com>
CC: linux-kernel@vger.kernel.org
Subject: Re: host buss on p4 xeon
References: <3DEFBEB7.9080500@markerman.com>
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Hi Byron

> I am testing some new dual 2.4/2.8ghz Xeon DP boxes. They all have the 
> ServerWorks GC -LE Chipset. I was looking at the dmesg out put and it 
> says that the host buss is 100mhz but I in all the docs about the mother 
> board it says it should 400. Is this some other number or is there some 
> patches I need to get the faster bus speeds?

Strictly speaking your docs are lying.

The Pentium4 and Xeon CPUs use a 100 or 133Mhz quad-pumped bus. Transfer 
4 items of data per clock getting an effective bandwidth of 400MHz at 
100MHz or 533 at 133MHz.

// Stefan

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