ASUS P5S-VM Motherboard

need to know what type of power supply this takes on the watts and volts and such.it has a amd-k6 2/500afx 2.2 volts socket 7. also would need to see what the 256 ram would b or higher.also trying to find a diagram or specs on the power wires on the motherboard and such.i have a power supply but i think its to high on the watts.the comp is wanting to stay on and not turn off or show any display on my monitor.hopefully youll have the answers to my questions.thanks