From owner-freebsd-hardware Wed Nov 13 22:30:36 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id WAA17778 for hardware-outgoing; Wed, 13 Nov 1996 22:30:36 -0800 (PST) Received: from nexgen.n4hhe.ampr.org (max7-108.HiWAAY.net [206.104.17.108]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id WAA17685 for ; Wed, 13 Nov 1996 22:29:14 -0800 (PST) Received: (from dkelly@localhost) by nexgen.n4hhe.ampr.org (8.7.5/8.7.3) id AAA05020; Thu, 14 Nov 1996 00:28:47 -0600 (CST) Message-ID: X-Mailer: XFMail 0.5-alpha [p0] on FreeBSD Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Thu, 14 Nov 1996 00:18:06 -0600 (CST) Organization: Amateur Radio N4HHE, Madison, AL. From: David Kelly To: Chuck Robey Subject: RE: CPU heatsinks Cc: FreeBSD-hardware@FreeBSD.org Sender: owner-hardware@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk On 04:11:38 Chuck Robey wrote: >>I was messing around with my new motherboard, getting it into the new >case, and one of the two heatsinks popped off. Understand it's a dual >Pentium Pro system, with heat sinks definitely larger than the old >Pentiums. I noticed on taking a very, very careful closer look, that the >heatsinks had been installed sans the usual white silicone heatsink >compound, which I have on hand (having used on previous systems). Is >there some reason on the PPro that the silicone hadn't been applied, or >should I neatly smear some on? Was it "bare metal to ceramic" or by any chance was there a gasket in between? There are thin silicon gaskets that have similar conductive properties as the grease and are much cleaner. I've seen a lot of other places these days where the thermal grease and/or gasket was not used, am guessing they decided the heatsink was "good enough". So I grease 'em because I can't stand knowing its not as good as it could be. Be sure to use a real thin coat. Only a little more than the thinest you can do. Apply a thin coat, put the heatsink in place, then remove it and observe the contact. If you made a nice perfect contact between both surfaces the first time you probably used too much. -- David Kelly N4HHE, dkelly@tomcat1.tbe.com (wk), dkelly@hiwaay.net (hm) ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system.