I have an old 867 Mhz G4 MDD that I would like to be able to leave running 24/7 as a server, jukebox etc. Right now it's noisy (these things are legendarily loud) and power hungry. It won't have to work very hard. What could I do to make it efficient and quiet enough to run 24/7, without dumping a lot of $$$? Obviously what I really need is a mac mini, but this will have to do.