Date: Thu, 5 Feb 1998 15:12:05 +1030 From: Greg Lehey <grog@lemis.com> To: steve <syoung@idirect.com> Cc: FreeBSD hardware Users <freebsd-hardware@FreeBSD.ORG> Subject: Re: Heat sinks and coolers: grease or pad? Message-ID: <19980205151205.22176@freebie.lemis.com> In-Reply-To: <1.5.4.16.19980204233006.26874a2e@idirect.com>; from steve on Wed, Feb 04, 1998 at 11:33:20PM -0500 References: <1.5.4.16.19980204233006.26874a2e@idirect.com>
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On Wed, 4 February 1998 at 23:33:20 -0500, steve wrote: > At 03:40 PM 1/29/98 +1030, you wrote: >> I recently bought an AMD K6/233, and I'm still looking for a cooler >> which will keep it cool enough. Today I got a thing double the size >> of the last (well-dimensioned) one, and mounted it. It look bovine >> rc564 3 minutes to overheat the processor. >> >> I'm wondering what to do next. Both this cooler (which claims a >> thermal resistance of 0.8°C/W) and the previous one have a pad stuck >> on to the processor side, presumably in order to facilitate heat >> transfer. What's the best way to use this? Should I use thermal >> grease anyway? Should I use it instead? Any other bright ideas? > > I have several amd k6-pr2/233 processors (all on dfi motherboards, 586ipvg); > no heat problems with a (regular) heat sink and cooling fan - you can touch > the edges of the cpu, it's just warm, not hot. Thanks for the information. I've now installed a new, larger heat sink, and things run fine. > Note that these processors should be 3.2 volts, not 3.3; I have more than > once had some other board pre-configured and 'set' with the voltage too > high. The result is burned fingers. In fact, there *are* some 3.3/3.3V processors out there; I saw them when I bought mine (which is the standard 3.3/3.2V), and was very suspcious. c't (the German magazine) reports that they were specials (probably half-rejects :-) which were never intended for the open market. I think part of my problem was that the motherboard has an "Automatic" voltage setting, which is supposed to autodetect the chip and set it accordingly. When I bought the board, they strongly recommended that I leave it on automatic. I've since changed to 3.2V. I don't know whether that, the cooler, or the combination sorted things out. BTW, has anybody seen that AMD had bought out a K6/266? It's in .25 micron technology, and instead of the 33W of the /233, it only uses 8W. c't tested it and found it to be good. Greg
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