Hello, I have a Powermac G5 DP 2.5 and it runs hot (50C Idle, up to 72C at full load). I want to replace the thermal paste to extend the life of the machine but also in hopes of getting the fans to run much slower as the computer is extremely loud most of the time (around 40-50% CPU usage usually kicks the fans to near full speed). From what I understand if I take the processor cards out which is necessary to replace the paste, the computer will detect a change in hardware and the fans will all run at 100% unless I run the Apple Service Diagnostics disc to calibrate the fans. Problem is there's none on ebay for sale and I can't find any download link at all. Wondering if anyone here has a link to this software. Some have said you can get the cd by going to an apple store but but it's such an old machine I doubt they would have it, and it'd be a long drive to get to my closest store.