Hi Dirk > But yet another QUESTION: > How does the upperside of your CPU with removed heatsink look like? > In my case there's a soft grey sticker/label (I'm not english, so I > hope one of the expressions might be appropriate). > > That's the only part which transfers the heat to the heatsink. > Can that become to old, useless or must it be renewed? > > What could be an alternative? I think about a fitting piece of copper > or a plate of lead. > In my eyes Apple's original solution isn't very effective at all.
It's along time since I've burrowed inside my Pismo - it just sits on a shelf, doing Tiger-powered webserving - but I think the grey stuff you mention might be thermal paste. That is gunk that's painted onto the top of the CPU to bond it to the bits that take the heat away. By dis-assembling the machine, you and I (and whoever else owned our Pismos previously) has undone this bond so that transferring heat away from the CPU is less efficient than originally. I used to hear the fan come on and stay on for quite a while, but when it happened didn't seem to correlate with processor-intensive tasks. Since I've just used it as webserver, Pismo's been quiet. It's never been too hot to have on my lap, while my MacBookpro has often threatened to scorch my unmentionables. I think you can buy new thermal paste but I've no idea how hard it is to apply it or whether you need to remove the old stuff first. This might be worth a read: http://discussions.apple.com/thread.jspa?threadID=2111658&tstart=75 Here's a tale of someone upgrading the heat-removal system to put in a G3/900 processor upgrade: http://www.sterpin.net/uk/pismologixuk.htm Anyone else? Bruce --~--~---------~--~----~------------~-------~--~----~ You received this message because you are a member of G-Books, a group for those using G3 iBooks and PowerBooks (we run a separate list for G4 'Books). The list FAQ is at http://lowendmac.com/lists/g-books.html and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g-books Support for older Macs: http://lowendmac.com/services/ -~----------~----~----~----~------~----~------~--~---
