Date: Sun, 01 Aug 1999 12:52:37 +0800 From: Peter Wemm <peter@netplex.com.au> To: Chuck Robey <chuckr@picnic.mat.net> Cc: FreeBSD-Alpha <alpha@FreeBSD.ORG> Subject: Re: Installing the heatsink Message-ID: <19990801045237.135331C1F@overcee.netplex.com.au> In-Reply-To: Your message of "Sat, 31 Jul 1999 16:38:22 -0400." <Pine.BSF.4.10.9907311635190.451-100000@picnic.mat.net>
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Chuck Robey wrote: > My alpha came with a heatsink that has what seems to be a thin lead > gasket, between the processor and the heatsink itself. I've never used > one before; I've always used silicone grease. > > Does anyone know if I should use that gasket, and (if so) how should I > think use the silicone grease (if at all)? Is there any rule of thumb > about tightening down those two bolts that connect the heatsink to the > processor? It's graphoil, a graphite sheet. Use it, that's what's spec'ed. :-) It's supposed to be compressible to eliminate any air pockets or whatever. Beware, make sure the sheet is trimmed to the right size and doesn't touch the capactitors on top of the CPU - that's a very good way to put 30 amps of 3.3v through your cpu and maybe blow up your power supply. (trust me, this warning is from personal experience :-). Now the question is, is the heatsink compound you're asking about conductive too? If so, what happens if it touches one of those components on top of the cpu? How tight? It's in the manual what to set a torque wrench to, but Mike Smith warned me that it's easy to strip the aluminium nuts, so don't overdo it. Just do it up tight enough - I did it about the same as drive mounting screws and case cover screws. Just make sure the heatsink doesn't move or slide at all as that's way too loose. I used a hand-size T wrench and socket to tighten it. Cheers, -Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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