Atx main power connector – Intel ATX12V User Manual

Page 34

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ATX12V Power Supply Design Guide

Version 2.0

34

4.5.1. ATX Main Power Connector

Connector: MOLEX* h

ousing: 24 Pin Molex Mini-Fit Jr. PN# 39-01-2240 or

equivalent

(Mating motherboard connector is Molex 44206-0007 or equivalent)

18 AWG is suggested for all wires except for the +3.3 V sense return wire, pin 11 (22 AWG).
For 300 W configurations, 16 AWG is recommended for all +12 VDC, +5 VDC, +3.3 VDC, and
COM.

Pin Signal

Color

Pin Signal

Color

1 +3.3VDC

Orange

13

[13]

+3.3VDC

[+3.3 V default
sense]

Orange

[Brown]

2 +3.3VDC

Orange 14

-12VDC

Blue

3

COM Black 15

COM Black

4 +5VDC Red

16

PS_ON#

Green

5

COM Black 17

COM Black

6 +5VDC Red

18

COM Black

7

COM Black 19

COM Black

8 PWR_OK

Gray 20

Reserved

N/C

9 +5VSB Purple 21

+5VDC Red

10 +12

V1DC

Yellow 22 +5VDC Red

11 +12

V1DC

Yellow 23 +5

VDC Red

12 +3.3

VDC

Orange 24 COM

Black

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