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[ The PC Guide | Systems and Components Reference Guide | Hard Disk Drives | Construction and Operation of the Hard Disk | Hard Disk Connectors and Jumpers ]

Power Connector

Hard disk drives use a standard, 4-pin male connector plug, that takes one of the power connectors coming from the power supply. This keyed, 4-wire plastic connector provides +5 and +12 voltage to the hard disk. See this discussion of drive power plugs in the power supply reference for more information.

A standard hard disk power connector. Note the
"4, 3, 2, 1" pin markings on the logic board, and the
square shape of solder pad for pin #1.

Next: Data Interface Connector

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