ATX Power Supply
   (at the motherboard)
   (at the cable)
20 PIN MOLEX 39-29-9202 at the motherboard
20 PIN MOLEX 39-01-2200 at the cable
Pin | Name | | Color | Description
1 | 3.3V | | Orange | +3.3 VDC
2 | 3.3V | | Orange | +3.3 VDC
3 | COM | | Black | Ground
4 | 5V | | Red | +5 VDC
5 | COM | | Black | Ground
6 | 5V | | Red | +5 VDC
7 | COM | | Black | Ground
8 | PWR_OK | | Gray | Power Ok (+5V & +3.3V is ok)
9 | 5VSB | | Purple | +5 VDC Standby Voltage (max 10mA)
10 | 12V | | Yellow | +12 VDC
11 | 3.3V | | Orange | +3.3 VDC
12 | -12V | | Blue | -12 VDC
13 | COM | | Black | Ground
14 | /PS_ON | | Green | Power Supply On (active low)
15 | COM | | Black | Ground
16 | COM | | Black | Ground
17 | COM | | Black | Ground
18 | -5V | | White | -5 VDC
19 | 5V | | Red | +5 VDC
20 | 5V | | Red | +5 VDC
18 AWG is recommended for all wires except pin 11, which should be 22 AWG
For 300W configurations 16 AWG is recommended.