On Nov 4, 12:16 am, "Tina K." <[email protected]> wrote: > > That might not be the case, I do remember some Apple model being > manufactured with too much thermal paste by mistake, but I don't > remember which model it was.
that was clearly a manufacturing mistake. i had a PB G4 1.67 hi-res model, and the processor burned out. when i disassembled it, i discovered that there were gobs and gobs of the thermal paste. WAY too much, and that undoubtedly contributed to the failure. i scraped chunks off the heatsink and when i replaced the mobo i used the proper amount, and it is still going strong. rule of thumb, however little you apply, it is too much. there isn't ANYTHING that is better than direct contact. the thermal paste is only to fill the microscopic voids between the two surfaces in direct contact. cover the entire surface with paste (don't get any over the edges), then scrape off as much as you can, press together firmly and then pull it apart, it should appear that there are large areas with no paste at all. this is the correct amount. i don't recall the brand name, but when i used to build high power solid-state amplifiers where the massive output transistors generated much more heat than a CPU, we used a white silicone grease. as another reader suggested, i would avoid any paste containing metallic powder, or powdered diamonds, either. the mere presence of solid particles in the paste means that it will likely be applied thicker than it should be. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml 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/g3-5-list
