Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 3 Feb 2002 02:37:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 3 Feb 2002 02:37:12 -0500 Received: from mpdr0.chicago.il.ameritech.net ([206.141.239.142]:21743 "EHLO mailhost.chi.ameritech.net") by vger.kernel.org with ESMTP id ; Sun, 3 Feb 2002 02:37:03 -0500 Message-ID: <3C5CE939.6030609@ameritech.net> Date: Sun, 03 Feb 2002 01:39:37 -0600 From: watermodem Reply-To: aquamodem@ameritech.net Organization: not at all User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.6) Gecko/20011012 X-Accept-Language: en-us MIME-Version: 1.0 To: Horst von Brand CC: Greg Boyce , linux-kernel@vger.kernel.org Subject: Re: Machines misreporting Bogomips In-Reply-To: <200202010959.g119xXH3008047@tigger.cs.uni-dortmund.de> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Horst von Brand wrote: > Greg Boyce said: > > [...] > > >>Every once in a while we come across single machines which are running a >>lot slower than they should be, and are misreporting their speed in >>bogomips under /proc/cpuinfo. Reinstalling the OS and changing versions >>of the kernel don't appear to affect the machines themselves at all. >> > > Just misrepresented bogomips or is the machine really slower? Perhaps the > CPU is being underclocked? > If they are Intel CPU's and the heatsink <-> CPU connection is poor (no heatsink compound, heatsink loose) or the fan is dead/dying or due to dust poor airflow this is reasonable. Intel CPUs slow down when they get hot as as safety measure. Clean the machine, remove the heatsink/fan. Replace fan if needed. (they are cheap so replace). Clean or replace heatsink. Apply a good heatsink compound such as ArticSilver. [just a small dab] Make sure you have proper contact and preasure. Re-run the speed test. If the video card, case or motherboard have fans check them too. Note that some of these heatsinks are epoxied on with a conductive epoxy so it is unlikely that you could safely remove those. Replacing the fans is ok though. If you are unsure of the proceses go to one of the hardware or overclocking web pages. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/