Atx Power Supply Cable Colors
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Atx power supply cable colors. See the pinout diagram to the right. 3 3v 5v and 12v. Most modern desktop computers conform to the atx standard which supplies three positive rails. The atx 24 pin 12v power supply connector can only be plugged in while pointing a specific direction on the motherboard.
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. If you have an atx power supply that therefore has a 20 pin connector it won t work with a newer motherboard that requires all 24 pins to be connected. Power supply extension cable kit. 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.
Computer power supplies psu convert ac to low voltage regulated dc power. 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. What is the wire color coding of atx computer power supplies. All cables connector detail.
The colors in this chart represent recommended wire colors in the psu cables. Atx advanced technology extended is a motherboard and power supply configuration specification developed by intel in 1995 to improve on previous de facto standards like the at design it was the first major change in desktop computer enclosure motherboard and power supply design in many years improving standardization and interchangeability of parts. In addition to the atx connector psus will have some or all of the following additional connectors. 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. The specification defines the. Click to share on twitter opens in new window. The colors are shown here just for reference you won t see them from the front.
More information on the atx 24 pin 12v psu connector. Accordingly different atx style psu may use different number of power wires. These diagrams reflect the front view. Atx specification includes not only power supply unit but also interface to case and motherboard.
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. Computer power supply wiring color code pdf.