Atx Power Supply Connectors
20 pin molex 39 29 9202 at the motherboard.
Atx power supply connectors. For the operation basics of smps psu see our power supply tutorial. An atx power supply provides a number of peripheral power connectors and in modern systems two connectors for the motherboard. Atx and pci e power supply connector socket guide atx and pci e sockets can be a bit of a mine field there are various sizes and some thateven look the same from a distance but have subtle differences pci e 6 2 and atx 8 4 4 i m looking at you. An 8 pin or 4 4 pin auxiliary connector providing additional power to the cpu and a main 24 pin power supply connector an extension of the original 20 pin version.
Standard atx power supplies typically have the main power connector p1 additional 12v connectors as well as peripheral floppy drive serial ata and pci express receptacles which we will describe below. The connector itself is a molex 39 01 2240 connector often called a molex mini fit jr. Atx 24 pin 12v power connector pinout atx v2 2. 20 pin molex 39 01 2200 at the cable.
The original atx systems had 20 pin main connector p1.