AT power supply delivers +5 V, +12 V, -5 V and -12 V voltages using two six-pin connectors. A few newer boards used an aditional connector for +3.3 V. Note, that you must install these connectors to the motherboard in a way that the black wires are placed on the center, or your equipment will be damaged.
P8 AT power supply connector
| Pin | Name | Color | Description | |
|---|---|---|---|---|
| 1 | PG | Orange | Power Good, +5 VDC when all voltages has stabilized. | |
| 2 | +5V | Red | +5 VDC (or n/c) | |
| 3 | +12V | Yellow | +12 VDC | |
| 4 | -12V | Blue | -12 VDC | |
| 5 | GND | Black | Ground | |
| 6 | GND | Black | Ground |
P9 AT power supply connector
| Pin | Name | Color | Description | |
|---|---|---|---|---|
| 1 | GND | Black | Ground | |
| 2 | GND | Black | Ground | |
| 3 | -5V | White or Yellow | -5 VDC | |
| 4 | +5V | Red | +5 VDC | |
| 5 | +5V | Red | +5 VDC | |
| 6 | +5V | Red | +5 VDC |
Note: Pins part number is 08-50-0276, Product specification is PS-90331.
P10 AT power supply connector (rarely seen)
|
Pin |
Name |
Color | Description | |
| 1 | GND | Black | Ground | |
| 2 | GND | Black | Ground | |
| 3 | GND | Black | Ground | |
| 4 | 3.3v | Green | +3.3 VDC | |
| 5 | 3.3v | Green | +3.3 VDC | |
| 6 | 3.3v | Green | +3.3 VDC |
