PC peripheral power

pinout

Used for harddisks & 5.25 floppy drives

4 pin Molex power connector  at the powersupply cable

Pin Name   Color Description 1 +12V   Yellow +12 VDC 2 GND   Black +12 V Ground (Same as +5 V Ground) 3 GND   Black +5 V Ground 4 +5V   Red +5 VDC

Source:www.pinouts.ru