Hardware pinouts information and cables schemes

ATX (ATX12V) 24 pin power supply connector pinout

connector or cable wiring scheme

bookmark this page

ATX12V 2.0 is a novel common ATX standard, use 24 pin connector.



Changes to ATX standard were made to support 75 watt PCI Express requirements. New ATX v 2.x uses new connector, but most motherboards nowdays allow to use an old ATX v 1.x power supply with 20 pin connector - it connects to 24 pin motherboard receptacle.

Pin Name Color Description
13.3V Orange+3.3 VDC
23.3V Orange+3.3 VDC
3COM BlackGround
45V Red+5 VDC
5COM BlackGround
65V Red+5 VDC
7COM BlackGround
8PWR_OK GrayPower Ok is a status signal generated by the power supply to notify the computer that the DC operating voltages are within the ranges required for proper computer operation
95VSB Purple+5 VDC Standby Voltage (max 10mA)
1012V Yellow+12 VDC
1112V Yellow+12 VDC
123.3V Orange+3.3 VDC
133.3V Orange+3.3 VDC
14-12V Blue-12 VDC
15COM BlackGround
16/PS_ON GreenPower Supply On (active low). Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF.
17COM BlackGround
18COM BlackGround
19COM BlackGround
20-5V White-5 VDC
21+5V Red+5 VDC
22+5V Red+5 VDC
23+5V Red+5 VDC
24COM BlackGround
/PSON activated by pressing and releasing the power button while the power supply is in standby mode. Activating /PSON connects the power supply�s /PSON input to ground, thereby switching the power supply to full-on condition.

18 AWG is recommended for all wires except pin 11, which should be 22 AWG. For 300W configurations 16 AWG is recommended.

Related Links:
Pinouts.ru > ATX, BTX, WTX and other power supply cables connectors pinouts listing >  Pinout of ATX (ATX12V) 24 pin power supply connector and layout of 24 pin MOLEX 44206-0007 connector and 24 pin MOLEX 39-01-2240 or equivalent connector
Document status: correct
Source(s) of this and additional information: ATX Spec v2.03 at Platform Development Support, from Hardware Book 7 reports
Last updated at Fri Sep 15 2006. Submit additions or corrections for this document. Is this document correct or incorrect? What is your opinion?
[Discuss at the forum] [Back to index] [SUBMIT new pinout]
This page contain parts under Copyright © 2000-2007 by pinouts.ru team.
No any portion of this webpage may be reproduced in any form without visible direct link to this page provided. Webmaster permission required in any other cases.
Efforts have been made to ensure this page is correct, but it is the responsibility of the user to verify the data is correct for their application.
72257 hits since October 27, 2006