Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!dali.cs.montana.edu!caen!sdd.hp.com!spool.mu.edu!uwm.edu!linac!att!princeton!njsmu!mccc!dworkin!johns From: johns@dworkin.Amber.COM (John Silvia) Newsgroups: comp.sys.amiga.hardware Subject: Re: A3000 Can't take the heat Message-ID: Date: 27 May 91 00:55:45 GMT References: <3399@sirius.ucs.adelaide.edu.au> Sender: bbs@dworkin.UUCP Organization: Labyrinth II BBS Lines: 21 If the DMAC chip is causing you trouble, then there is a simple solution. Just install a heat sink on top of the chip, and then order the replacement with your dealer. A cheap Radio Shack heat sink with some of the heat sink compound would do a lot to keep the chip cool. As it is, I believe that the DMAC chip is directly underneath the disk drives, near the RAM and the CPU slot. Just adding a slim line aluminum heat sink onto the chip would probably give the machine another 10-20 degrees of tolerance. There is a fan in the back of the A3000, and it hangs down beneath the power supply to help gather a little breeze under the drives, and help keep the ram cool. If you are rich, then there are chip cooling fans, which use a small piezo electric element, which can mount on their side inside the case, blowing a little air across the chip. This with a heat sink would keep the chip really cool. Just remember that you could affect the amount of space that is available for the 040 chip when it's available, so keep the height to a minimum. Using maximum area, say over 5 square inches would work nicely, and then a small standoff to channel the heat up from the chip.