ATX power supply pinout is the configuration of the connector pin ATX power supply that is used on a computer mainboard. Each pin associated with the color of the cable used to represent their respective functions. Each serves as a contact with three voltage polarity, ie positive, negative, earth, the configuration data.
In general, the ATX power supply pinout is connected to the voltage +3.3 V, +5 V,-5V, +12 V,-12V and 0V (Ground). Connected with the data is a function OK and Power Supply Power ON. Power OK is a status signal generated by the power supply to notify the computer. That the DC operating voltages are within the ranges required for proper computer operation (+5 VDC power is Ok). Power Supply On (active low). Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF. And -5 VDC (this is optional on newer ATX version 2.0 supplies. It is for use with older AT class expansion cards and can be omitted on newer units).
ATX Power Supply Circuit
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