describe here
http://t0.gstatic.com/images?q=tbn:HVDY-2IQPUWb_M:http://i435.photobucket.com/albums/qq79/Ughadoo/Conectores/20-pin_ATX_connector.png&t=1
Shortcut black and green:
http://www.jestineyong.com/?p=267 http://www.jestineyong.com/wp-content/uploads/2007/09/atx-power-bypass.jpg