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The power supply changes the 120v ac 60 hz (in the us and Canada) to dc 12v, dc 5v, and dc 3.3 v that the computer components can use. The power supply is rated in power supplied as watts of power.

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14y ago
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7y ago

The power supply converts alternating electric current (AC) into a form that the computer use. It reduces the electric outlet voltage from 100-200 volts electric outlet Alternating Current (AC) to a lower voltage Direct Current (DC) used by the CPU and other computer components.

The power supply generates heat which can be damaging to itself and the computer. To avoid this desktop computer power supplies have fans and ventilation to prevent overheating. In notebook style computers, the power supply is a module (box) separate from the rest of the unit so its heat does not affect the computer.

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Q: Inside the computer and is the part that changes the electric current into a form that the computer can use?
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