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Power Supply
by John Anthony


A power supply is installed in the back corner of the PC case, next to the motherboard.

It converts 120 VAC (standard house power) into DC voltages that are used by other components in the PC.

A 24 conductor cable carries +5vdc, -5vdc +12vdc, -12vdc and ground to the motherboard.

Another pair of cables, each with four conductors and two 4-pin connectors daisy-chained along it, carry +5vdc, +12vdc and ground to the various drives.

Typical PC power supplies are rated at 200-250 watts and sell for about $50 - $75. Higher wattage supplies are available.

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