From owner-freebsd-hardware Thu Nov 14 04:40:11 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id EAA06233 for hardware-outgoing; Thu, 14 Nov 1996 04:40:11 -0800 (PST) Received: from po1.glue.umd.edu (po1.glue.umd.edu [129.2.128.44]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id EAA06225 for ; Thu, 14 Nov 1996 04:40:09 -0800 (PST) Received: from carrier.eng.umd.edu (carrier.eng.umd.edu [129.2.98.188]) by po1.glue.umd.edu (8.8.2/8.7.3) with ESMTP id HAA02403; Thu, 14 Nov 1996 07:40:06 -0500 (EST) Received: from localhost (chuckr@localhost) by carrier.eng.umd.edu (8.7.5/8.7.3) with SMTP id HAA24080; Thu, 14 Nov 1996 07:40:05 -0500 (EST) X-Authentication-Warning: carrier.eng.umd.edu: chuckr owned process doing -bs Date: Thu, 14 Nov 1996 07:40:05 -0500 (EST) From: Chuck Robey X-Sender: chuckr@carrier.eng.umd.edu To: David Kelly cc: FreeBSD-hardware@FreeBSD.org Subject: RE: CPU heatsinks In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hardware@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk On Thu, 14 Nov 1996, David Kelly wrote: > > 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. Never seen the gasket thing. The Pentium-Pro chip is considerably larger than the Pentium ... do you happen to have any reference to where I might pick up this gasket? I don't like smearing messy glue either. > 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. > ----------------------------+----------------------------------------------- Chuck Robey | Interests include any kind of voice or data chuckr@eng.umd.edu | communications topic, C programming, and Unix. 9120 Edmonston Ct #302 | Greenbelt, MD 20770 | I run Journey2 and picnic, both FreeBSD (301) 220-2114 | version 3.0 current -- and great FUN! ----------------------------+-----------------------------------------------