Computers, Laptops & Tablets > Accessories & Hardware ATX 4-pin 12V Power Connector Pinout Pinout for the Standard ATX 4-pin (2x2) 12V Motherboard Power Connector By Tim Fisher Tim Fisher Facebook Twitter VP and General Manager, Lifewire.com Emporia State University Tim Fisher has more than 30 years' of professional technology experience. He's been writing about tech for more than two decades and serves as the VP and General Manager of Lifewire. lifewire's editorial guidelines Updated on December 2, 2020 Tweet Share Email Accessories & Hardware The Quick Guide to Webcams Keyboards & Mice Monitors Cards HDD & SSD Printers & Scanners Raspberry Pi The ATX 4-pin power supply connector is a standard motherboard power connector used to provide +12 VDC to the processor voltage regulator. ATX 4-pin 12V Power Connector Pinout (ATX v2.2) Wikimedia Commons Below is the complete pinout table for the standard ATX 4-pin (2x2) 12V power connector as of Version 2.2 of the ATX Specification (PDF). If you're using this pinout table to test power supply voltages, be aware that the voltages must be within ATX specified tolerances. You can see other ATX power supply connector pinouts in our ATX Power Supply Pinout Tables list. Pinout Reference for ATX 4 pin 12V Power Connectors Pin Name Color Description 1 COM Black Ground 2 COM Black Ground 3 +12VDC Yellow +12 VDC 4 +12VDC Yellow +12 VDC 2:23 How to Test the Power Supply in a Computer The plug (male) is a Molex 39-01-2040 connector, the vertical receptacle (female) is a Molex 39-28-1043, and the right-angle receptacle is a Molex 39-29-1048. Pinout for the Standard ATX 24-pin 12V Motherboard Power Connector Was this page helpful? Thanks for letting us know! Get the Latest Tech News Delivered Every Day Email Address Sign up There was an error. Please try again. You're in! Thanks for signing up. There was an error. Please try again. Thank you for signing up! Tell us why! Other Not enough details Hard to understand Submit