Internet, Networking, & Security Home Networking ATX 6 pin 12V Power Connector Pinout Pinout for the ATX 6 pin (3x2) 12V Motherboard Power Connector by Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated on November 15, 2019 Home Networking Installing & Upgrading The Wireless Connection Routers & Firewalls Network Hubs ISP Broadband Ethernet Wi-Fi & Wireless Tweet Share Email The ATX 6 pin power supply connector is a motherboard power connector used to provide +12 VDC to the processor voltage regulator. This 6-pin connector is also sometimes used to provide extra power to high-end video cards. On motherboards, the more common connector used for this purpose is the ATX 4 pin Power Connector, used either by itself or with a second 4-pin connector, creating an 8-pin connector. The terms "PCI Express cables" or "PEG cables" (for PCI Express Graphics) are sometimes used to describe a 6 pin 12V power connector. Tim Fisher ATX 6 pin 12V Power Connector Pinout (ATX v2.2) Below is the pinout for the standard ATX 6 pin (3x2) 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. Pinout Reference for ATX 6 pin 12V Power Connectors Pin Name Color Description 1 COM Black Ground 2 COM Black Ground 3 COM Black Ground 4 +12VDC Yellow +12 VDC 5 +12VDC Yellow +12 VDC 6 +12VDC Yellow +12 VDC You can see other ATX power supply connector pinouts in our ATX Power Supply Pinout Tables list. 2:23 How to Test the Power Supply in a Computer Using an ATX 6 pin 12V Power Connector The 6 pin 12V power connector is used to power PCI Express expansion cards that require more power than their expansion slots can provide, (which is 75 watts. Some video cards, for example, draw more than 75 watts, in which case connecting a 6 pin 12V power cable can provide more power to the card. Video cards sometimes come with an 8 pin connector if they can utilize more power than what a 6 pin cable can provide. If this is the case, but you only have a 6 pin 12V power connector, a 6-pin one will fit but won't provide any more than what the 6-pin provides. Unfortunately, even though a smaller cable fits, some cards simply won't work properly without the full power provided by an 8-pin connector. Be sure to check your video card's documentation to see if this 6-instead-of-8-pin configuration will work for you. Some power supplies come with a 6+2 PCI Express power cable, which is a cable that has both a 6 pin power connector and an additional 2 pin power connector semi-attached, which can either be combined to become an 8-pin ATX cable or kept separate to work with 6-pin-only connections. If you have a power supply that has two free 4 pin molex power connectors, but your video card requires a 6 pin 12V power connector, you can use an adapter. More from Lifewire SATA 15-Pin Power Connector Pinout Floppy Drive 4-Pin Power Connector Pinout Molex 4-pin Peripheral Power Connector Pinout ATX Power Supply Pinout Tables How to Manually Test a Power Supply With a Multimeter ATX 24 pin 12V Power Supply Pinout ATX 4 pin 12V Power Connector Pinout Computer Power Supply Supplemental PC Power Supplies Power Supply Voltage Tolerances How to Use a Power Supply Tester to Test a PSU Parallel ATA (PATA) Installing a Desktop PC Motherboard Buyer's Guide to PC Motherboards How to Reseat Internal Data and Power Cables What Does the Inside of Your PC Look Like?