Paul: If you are running OS 9, look at the firmware update to control the fan: http://docs.info.apple.com/article.html?artnum=120171 Also, check the lowendmac profiles: http://lowendmac.com/ppc/mdd-power-mac-g4-dual.html and search for "MDD" in the Search LEM box. Also, at lowendmac is the LEM Swap List: http://lowendmac.com/lists/index.shtml Al Poulin On May 28, 2008, at 2:54 AM, Paul wrote: > Hello all, > > as many of you would know, the MDD G4 Power Macs had a reputation > for being rather noisy - so much so that Apple initiated (after > pressure from many disgruntled users) a program to replace the power > supply and CPU fan in offending machines. > > I have a G4 MDD 1.25 GHz DP FW400, and I tried to use it for a few > days - I work as a sole trader in a fairly quiet room in the house - > I found the noise to be so intolerable that I went back to my G4 933 > MHz, which is what I’m using now. My MDD has the original PS and fan. > > I read on the Internet that most people reported the replacement fan > and PS made a real difference in noise levels. So, if anyone out > there has one of these revised power supplies or both fan and power > supply, please let me know. I am keen to pick one up. I believe the > replacement PS was marked “REV B”, as opposed to the “REV A” of the > original. > > Thanks > Paul _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4