ATX 24-pin 12V Power Supply Pinout: Understanding the Basics

The ATX 24-pin 12V Power Supply Pinout is an essential component for any PC enthusiast. It provides the necessary power to keep your computer running smoothly and efficiently. The pinout is the layout of the pins on the power supply connector. Understanding the pinout is crucial to ensure safe installation and usage of the power supply unit (PSU).

The ATX 24-pin configuration is standardized for modern PC motherboards. Older motherboards use a 20-pin connector. However, today’s motherboards require more power and thus require the 24-pin configuration. The ATX 24-pin power supply pinout consists of 24 pins arranged in two rows of 12 pins each. The pins are labeled from 1 to 24.

The following is a breakdown of each pin and its function:

Pin 1 – +3.3V (Orange)

This pin provides 3.3 volts DC power to the motherboard’s integrated circuits.

Pin 2 – +3.3V (Orange)

This pin also provides 3.3 volts DC power to the motherboard.

Pin 3 – COM (Black)

This pin is the common ground for the power supply.

Pin 4 – +5V (Red)

This pin supplies 5 volts DC power to the motherboard.

Pin 5 – COM (Black)

This pin is another common ground for the power supply.

Pin 6 – +5V (Red)

This pin provides another 5 volts DC power to the motherboard’s circuitry.

Pin 7 – COM (Black)

This pin serves as yet another common ground for the power supply.

Pin 8 – PWR_OK (Gray)

This pin sends a signal to the motherboard telling it that the power supply is ready to provide power.

Pin 9 – 5VSB (Purple)

This pin provides 5 volts DC power when the computer is in standby mode.

Pin 10 – +12V (Yellow)

This pin provides the main 12 volts DC power to the motherboard’s components.

Pin 11 – +12V (Yellow)

This pin is another 12-volt DC power supply output.

Pin 12 – +3.3V (Orange)

This pin is the third 3.3 volts DC power output.

Pin 13 – +3.3V (Orange)

This pin is the fourth 3.3 volts DC power output.

Pin 14 – COM (Black)

This pin provides a ground for the +12V power outputs.

Pin 15 – COM (Black)

This pin is the common ground for the -12V power output.

Pin 16 – COM (Black)

This pin provides a ground for the PS_ON# signal.

Pin 17 – COM (Black)

This pin is the common ground for the +5V power outputs.

Pin 18 – -12V (Blue)

This pin provides a -12 volts DC power output.

Pin 19 – +5V (Red)

This pin is the fifth 5 volts DC power output.

Pin 20 – +5V (Red)

This pin is the sixth 5 volts DC power output.

Pin 21 – +5V (Red)

This pin is the seventh 5 volts DC power output.

Pin 22 – +3.3V (Orange)

This pin is the eighth 3.3 volts DC power output.

Pin 23 – +3.3V (Orange)

This pin is the ninth 3.3 volts DC power output.

Pin 24 – COM (Black)

This pin is the common ground for the +3.3V power outputs.

In summary, the ATX 24-pin 12V Power Supply Pinout provides the necessary power to keep your PC running. It is essential to understand the function of each pin to ensure a safe installation and to troubleshoot any issues that may arise. With the knowledge of the pinout, you can build a high-performance PC that will meet all your computing needs.