From owner-freebsd-questions@FreeBSD.ORG Wed Oct 19 23:48:32 2005 Return-Path: X-Original-To: questions@freebsd.org Delivered-To: freebsd-questions@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 20D5D16A41F for ; Wed, 19 Oct 2005 23:48:32 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from pi.codefab.com (pi.codefab.com [199.103.21.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id A94FB43D69 for ; Wed, 19 Oct 2005 23:48:31 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from localhost (localhost [127.0.0.1]) by pi.codefab.com (Postfix) with ESMTP id AD1155D7E; Wed, 19 Oct 2005 19:48:30 -0400 (EDT) Received: from pi.codefab.com ([127.0.0.1]) by localhost (pi.codefab.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 53551-06; Wed, 19 Oct 2005 19:48:29 -0400 (EDT) Received: from [192.168.1.3] (pool-68-161-76-130.ny325.east.verizon.net [68.161.76.130]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by pi.codefab.com (Postfix) with ESMTP id 51E1A5C90; Wed, 19 Oct 2005 19:48:29 -0400 (EDT) Message-ID: <4356DB52.9030800@mac.com> Date: Wed, 19 Oct 2005 19:48:34 -0400 From: Chuck Swiger Organization: The Courts of Chaos User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Glenn Dawson References: <20051019204428.GB46703@polands.org> <7BF2FC41-83C1-4E8C-8201-846783762B7B@mac.com> <4356CF56.2090106@gmail.com> <6.2.3.4.2.20051019161158.05ff9160@cobalt.antimatter.net> In-Reply-To: <6.2.3.4.2.20051019161158.05ff9160@cobalt.antimatter.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: amavisd-new at codefab.com Cc: Doug Poland , kurt.buff@gmail.com, questions@freebsd.org Subject: Re: Installing 2nd CPU on SMP board X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Oct 2005 23:48:32 -0000 Glenn Dawson wrote: > At 03:57 PM 10/19/2005, Kurt Buff wrote: [ ... ] >>> You want to get the same speed, FSB, and family number of Xeon, and it >>> is preferable to get the same stepping number if possible. > > It's better to match the sSpec numbers...those include the stepping, and > not all processors of the same stepping have the same sSpec. Intel's documentation for dual-proc and multiproc compatibility is based on family ID and stepping #, not on the s-spec #. The family ID is akin to a major version number, and the stepping is akin to a minor version number. You can get the family ID and stepping from dmesg, you cannot get the sSpec number via that directly. For example: CPU: Intel(R) Xeon(TM) CPU 3.00GHz (2992.71-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0xf43 Stepping = 3 Features=0xbfebfbff Hyperthreading: 2 logical CPUs If you hunt down the right Xeon document: http://download.intel.com/design/Xeon/specupdt/30240216.pdf ...and search for "0xf43", you get: S-Spec CoreStepping CPUID CoreFreq FSB L2_cache .... SL7ZF N0 0F43h 3 800 2 MB 604-pin micro-PGA -- -Chuck