From owner-freebsd-questions@FreeBSD.ORG Mon Jul 21 12:41:06 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 984D1106566B for ; Mon, 21 Jul 2008 12:41:06 +0000 (UTC) (envelope-from iwrTech@iwr.ru.ac.za) Received: from a.mail.ru.ac.za (a.mail.ru.ac.za [IPv6:2001:4200:1010::25:1]) by mx1.freebsd.org (Postfix) with ESMTP id BD2078FC0C for ; Mon, 21 Jul 2008 12:41:05 +0000 (UTC) (envelope-from iwrTech@iwr.ru.ac.za) Received: from iwr.ru.ac.za ([146.231.64.249]:57281) by a.mail.ru.ac.za with esmtp (Exim 4.68 (FreeBSD)) (envelope-from ) id 1KKuhK-000C98-JU; Mon, 21 Jul 2008 14:41:02 +0200 Received: from iwr61.iwr.ru.ac.za ([146.231.64.161]) by iwr.ru.ac.za with esmtp (Exim 4.69 (FreeBSD)) (envelope-from ) id 1KKuhK-0004q1-Is; Mon, 21 Jul 2008 14:41:02 +0200 From: "DA Forsyth" Organization: IWR To: freebsd-questions@freebsd.org Date: Mon, 21 Jul 2008 14:41:01 +0200 MIME-Version: 1.0 Message-ID: <48849FFD.10285.C71CED5@iwrtech.iwr.ru.ac.za> Priority: normal X-mailer: Pegasus Mail for Windows (4.41) Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Content-description: Mail message body X-Virus-Scanned: a.mail.ru.ac.za (146.231.129.33) Cc: achill@matrix.gatewaynet.com Subject: re: Monitoring CPU temperature: mbmon shows 201 degrees C X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: iwrTech@iwr.ru.ac.za List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 21 Jul 2008 12:41:06 -0000 From: Achilleas Mantzios > Hi, i have had various crashes and segfaults in the last hot days > (room temp about 30 deg C). I tried to monitor CPU temp with mbmon, > which shows a very big value in COU temperature: > I also opened the case in order to get ventilated with fresh air from > the room. Actually, that doesn't work, your components will get hotter. This is because the case provides a through flow environment where air is forced to flow over most of the components most of the time. By opening the case you remove the force, and now have to rely on convection. What you want to do is make sure all the fans are running freely. Especially the processor fan. It may have stopped silently an dthat would definitely cause crashes. A fan at the front of the case blowing IN is more effective than one on the back blowing out, so if there isn't one on the front, add one. The 80 to 120mm ones can be very quiet and some can control their own speed if your motherboard cannot do it. If one can blow in the front and directly on the harddrives then that is a bonus, cool harddrives last longer. The basic idea of a case is to have air coming in the front and exiting at the rear. So make sure all your fans are blowing in the right direction. My office goes to 38C in summer, and all 5 computers just keep on going, using the principles above. I fitted a fan to the UPS as well (-: -- DA Fo rsyth Network Supervisor Principal Technical Officer -- Institute for Water Research http://www.ru.ac.za/institutes/iwr/