ATX Power Supply Cable 20-pin configuration

ATX power supply 20-pin configuration

Pin Wire Color Function
1 Orange +3.3 VDC
2 Orange +3.3 VDC
3 Black Ground (COM)
4 Red +5.0 VDC
5 Black Ground (COM)
6 Red +5.0 VDC
7 Black Ground (COM)
8 Gray (PWR_OK) Notifies PSU that DC Voltages are within tolerances
9 Purple +5.0 VDC (Standby Voltage)
10 Yellow +12.0 VDC
11 Orange +3.3 VDC
12 Blue (-12.0 VDC)
13 Black Ground (COM)
14 Green (PS_ON) Power Supply On. The unit can be powered up by jumpering pin 16 with a ground pin (such as pin 17)
15 Black Ground (COM)
16 Black Ground (COM)
17 Black Ground (COM)
18 White (-5.0 VDC)
19 Red +5.0 VDC
20 Red +5.0 VDC