I was using an A500 psu with my 1200D that had a 5400rpm 20GB HD and a DVD-ROM connected to a 4x IDE interface, a MTec 1230/28 8MB, a topolinoIII and a DCE internal SD/FF... but you have a 040, which is power-hungry, better look for info on how to convert a standar ATX PSU to use with your amiga...
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