FIC P4MA PRO 533 User Manual page 20

The FIC P4MA PRO 533 mainboard requires an ATX power supply for powering
the system. Before inserting the power supply connector, always make sure
that all components are installed properly to ensure that no damage will be
caused.
ATX 20-Pin Power Connector: ATXPWR
This connector is for the ATX power supply. To connect to the ATX power
supply, make sure the plugs of the power supply are inserted in the correct
orientation and the pins are properly aligned. Then, push down the plugs
firmly into the connector.
ATX 12V Power Connector: ATX12V
This 12V power connector is used to provide power to the CPU.
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