From owner-freebsd-questions@FreeBSD.ORG Mon Oct 6 14:39:47 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 AB024106568F for ; Mon, 6 Oct 2008 14:39:47 +0000 (UTC) (envelope-from kirk@strauser.com) Received: from kanga.honeypot.net (kanga.honeypot.net [IPv6:2001:470:a80a:1:21f:d0ff:fe22:b8a8]) by mx1.freebsd.org (Postfix) with ESMTP id 5D17A8FC0C for ; Mon, 6 Oct 2008 14:39:47 +0000 (UTC) (envelope-from kirk@strauser.com) Received: from localhost (localhost [127.0.0.1]) by kanga.honeypot.net (Postfix) with ESMTP id 9C2F7944FE2 for ; Mon, 6 Oct 2008 09:39:46 -0500 (CDT) X-Virus-Scanned: amavisd-new at honeypot.net Received: from kanga.honeypot.net ([127.0.0.1]) by localhost (kanga.honeypot.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3jJ2V7HFWzAq for ; Mon, 6 Oct 2008 09:39:41 -0500 (CDT) Received: from pooh.honeypot.net (pooh.honeypot.net [IPv6:2001:470:a80a:1:20a:95ff:fed5:10f2]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by kanga.honeypot.net (Postfix) with ESMTPSA id 3A40D944FB9 for ; Mon, 6 Oct 2008 09:39:41 -0500 (CDT) Message-Id: From: Kirk Strauser To: FreeBSD Questions ML Mime-Version: 1.0 (Apple Message framework v929.2) Date: Mon, 6 Oct 2008 09:39:40 -0500 X-Mailer: Apple Mail (2.929.2) Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Coretemp seems to be off quite a bit 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: Mon, 06 Oct 2008 14:39:47 -0000 I have a Gigabyte motherboard with an Intel ICH-9 chipset, and a 3.0GHz Core 2 Duo (E8400). The coretemp sysctls seem to always show 50C as the baseline temperature: $ sysctl dev.cpu | grep temp dev.cpu.0.temperature: 50 dev.cpu.1.temperature: 50 This is with a big PSU fan, a good CPU fan, a clean heatsink, and two case fans aimed the right direction (front fan pulling cool air in, rear fan pushing warm air out). If I reboot and go into the BIOS, I get numbers around 42-43C. I know it's kind of hard to compare directly, but the coretemp numbers are from a totally idle system with powerd scaling it back to 373MHz, so it should be as cool as when sitting idle in the BIOS screens. When I work the system hard, like running "make -j4 buildworld", I see temperatures up around 63-64C, and I'm almost positive that's not right. Any ideas why coretemp and the BIOS would show such different numbers? -- Kirk Strauser