ATX Version 3.0 Multi Rail Desktop Platform Power Supply
Design Guide
Main Power Connector – REQUIRED
Connector: Molex* Housing: 24 Pin Molex Mini-Fit Jr. PN# 39-01-2240 or equivalent.
Contact: Molex 44476-1112 (HCS) or equivalent (Mating motherboard connector is Molex 44206-0007 or equivalent).
18 AWG is suggested for all wires except for the +3.3 V supply and sense return wires combined into pin 13 (22 AWG).
Table 5-1. Main Power Connector Pin-Out
Pin | Signal | Color | Pin | Signal | Color | |
1 | +3.3V DC | Orange | 13 | +3.3V DC [+3.3 V default sense] | Orange [Brown] | |
2 | +3.3V DC | Orange | 14 | -12V DC | Blue | |
3 | COM | Black | 15 | COM | Black | |
4 | +5V DC | Red | 16 | PS_ON# | Green | |
5 | COM | Black | 17 | COM | Black | |
6 | +5V DC | Red | 18 | COM | Black | |
7 | COM | Black | 19 | COM | Black | |
8 | PWR_OK | Gray | 20 | Reserved | NC | |
9 | +5VSB | Purple | 21 | +5V DC | Red | |
10 | +12V1 DC | Yellow | 22 | +5V DC | Red | |
11 | +12V1 DC | Yellow | 23 | +5V DC | Red | |
12 | +3.3V DC | Orange | 24 | COM | Black |