If you're worried about power consumption of the Music Server, don't. If you are just using it for music you can get away with a very minimalist machine. I use mine for a lot more than music - downloading, recording HDTV, serving music and video, etc,. and I can get away with a 150W pico PSU. For only serving music you can do with a lot less.
7/12/12 at 6:43am