Atx Power Supply Cable Colors

Most modern desktop computers conform to the atx standard which supplies three positive rails.

Atx power supply cable colors. 4 pin molex connectors aka peripheral connectors 12v2 connector aka p4 12v connector pci express pci e power connector sata power connector floppy drive power connector aux power connector s i would suggest that you ignore the last three connectors listed as they are. The atx 24 pin 12v power supply connector can only be plugged in while pointing a specific direction on the motherboard. Accordingly different atx style psu may use different number of power wires. What is the wire color coding of atx computer power supplies.

Click to share on twitter opens in new window. The colors in this chart represent recommended wire colors in the psu cables. Whats people lookup in this blog. 3 3v 5v and 12v.

These diagrams reflect the front view. The colors are shown here just for reference you won t see them from the front. All cables connector detail. Computer power supply wiring color code pdf.

Atx power supply pinout and connectors. See the pinout diagram to the right. More information on the atx 24 pin 12v psu connector. In addition to the atx connector psus will have some or all of the following additional connectors.

The extra four pins were added with this specification to supply extra power through 12v rails so a 20 pin psu can t provide enough power to run this kind of motherboard. Computer power supplies psu convert ac to low voltage regulated dc power. Power supply extension cable kit. Computer power supply diagram and operation turn a computer power supply into bench make converting a pc power supply 24 pin motherboard power connector pinout.

In addition to the old at standard atx 2 0 has one extra voltage line available 3 3v a connector chain lined to the single 20 pin and a power on wire that allows software to turn off the psu. 24 pin atx extension cable x 1 4 4 pin eps cable x 1 8 pin pci e cable x 2 6 pin pci e cable x 2 24 pin cable comb x 4 8 pin cable comb x 12 6 pin cable comb x 8. For an atx style power supply there is a single 20 pin connector two rows of ten wires. If you look carefully at the following illustration you can see that the pins take a unique shape a shape which the motherboard matches in only one direction.

The specification defines the. Atx specification includes not only power supply unit but also interface to case and motherboard.