I'm trying to put a computer in my car which I can run as a MP3 player (i'm sure you've all seen different peoples attempts at these). Anyway at the moment I have a 140watt power inverter which plugs in to the cigerrete plug in my car to power the computer, however the lowest PSU I have found is 145watts. Does anybody know if you can get lower PSU's, and more importantly where I can get them (couldn't see any old ones on Ebay). Also what spec computers would I be able to get running on somthing under 145W?

Alternatively, does anybody know if running the inverter at 5w greater than the recommended amount for long periods of time will damage it?

Thanks for the help