I recall a German company offering at one time some specific Fan systems replacement for the MDD "windtunnel" I think its Vantec... hold on I am looking for the Link I used to have. Sorry I cannot find the link I once had. Anywho... You shouldn't have too many issues buying a new 120mm case fan from a dealer like Newegg and swapping out the old Case fan for a new one. I used to read on www.xlr8yourmac.com some forum for people trying to quiet their MDD G4's. I myself have gotten used to the hum and whir. Fortunately I am dabble in graphics and photoshop, not music. Peace and Good Luck, Luke Rademacher Liquid Zone Graphics Mac mini 2.0Ghz Intel Core 2 Duo, 3GB RAM, 80GB HD, Combo DVD/CDRW, Mac OSX Leopard 10.5.5, ext NewerTech miniStack w/ 320GB HD. MDD Dual 1.25Ghz G4, 2GB RAM, 250GB/120GB/80GB HD's, 16x DL DVD±R/RW Superdrive, Mac OSX Tiger 10.4.11, Classic Mac OS 9.2.2. External 1TB HD FireWire 400 Intel Celeron 2GHz, 1GB RAM, 80GB HD, Ubuntu Linux 8.04 5.5th gen 80GB Enhanced Video iPod Canon CanoScan 8400F Canon Pixma iP4500 On Nov 11, 2008, at 10:45 AM, Chris Powell wrote: > Hi all, > > This is my first post to the list after purchasing a Dual 867 MDD a > few months ago. It's my first Mac and I've really enjoyed using - > and tinkering - with it. > > Although the G4 has performed flawlessly, one problem I've run into > is fan noise. I purchased the G4 in part to use as a music server > to stream music to my APX, but the noise is seriously interfering > with listening to the quieter pieces on the stereo. > > I'm really interested in trying to replace the fans and have read a > few of the chestnuts online detailing fan replacement, but I'm > having a hard time tracking down the fans that are listed. Does > anyone know of current fans that I can use and where to purchase them? > > Thanks in advance for your help. > > Chris >