From owner-freebsd-current@FreeBSD.ORG Fri Dec 14 22:16:32 2007 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D9BED16A418 for ; Fri, 14 Dec 2007 22:16:32 +0000 (UTC) (envelope-from SRS0=be4de6480801af553ad9ecfe07bae72c734ddbd9=549=es.net=oberman@es.net) Received: from postal1.es.net (postal1.es.net [IPv6:2001:400:14:3::6]) by mx1.freebsd.org (Postfix) with ESMTP id 5A3E513C448 for ; Fri, 14 Dec 2007 22:16:32 +0000 (UTC) (envelope-from SRS0=be4de6480801af553ad9ecfe07bae72c734ddbd9=549=es.net=oberman@es.net) Received: from ptavv.es.net (ptavv.es.net [198.128.4.29]) by postal1.es.net (Postal Node 1) with ESMTP (SSL) id TIE29831 for ; Fri, 14 Dec 2007 14:16:31 -0800 Received: from ptavv.es.net (ptavv.es.net [127.0.0.1]) by ptavv.es.net (Tachyon Server) with ESMTP id 0AE8645014 for ; Fri, 14 Dec 2007 14:16:31 -0800 (PST) To: current@freebsd.org Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1197670590_6001P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Fri, 14 Dec 2007 14:16:31 -0800 From: "Kevin Oberman" Message-Id: <20071214221631.0AE8645014@ptavv.es.net> X-Sender-IP: 198.128.4.29 X-Sender-Domain: es.net X-Recipent: ; X-Sender: X-To_Name: X-To_Domain: freebsd.org X-To: current@freebsd.org X-To_Email: current@freebsd.org X-To_Alias: current Cc: Subject: Dust out your heat syncs! X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Dec 2007 22:16:32 -0000 --==_Exmh_1197670590_6001P Content-Type: text/plain; charset=us-ascii Content-Disposition: inline This is a bit off topic, but I have commented on the issue of dusty heat syncs in the past. With the recent discussion of the high temps generated by the last V7-beta on some systems (not mine), I thought that I would remind folks. I just dusted out my 2.5 year old laptop (2 GHz Pentium-M) and the difference was impressive. (And so was the cloud of dust I blew out!) Quiescent temperature dropped from 60C to 53C and the peak temperature during a kernel build dropped from a very toasty 90C to a comfortable 72C. 18C (32F) is a huge improvement! The dust either a laptop or a tower can collect is impressive, even in a fairly clean environment. I suspect an annual cleaning of heat syncs could significantly increase both the reliability and lifetime of systems. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 --==_Exmh_1197670590_6001P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) Comment: Exmh version 2.5 06/03/2002 iD8DBQFHYwC+kn3rs5h7N1ERArTCAKCgb7k+Sf8eT7AkngRt8IhngELp4wCeJ+yA 2eh8XH/CrMqFPzwz5kqRw1w= =jsQ6 -----END PGP SIGNATURE----- --==_Exmh_1197670590_6001P--