A computer power supply is a device that supplies electrical energy to a computer. It converts the alternating current (AC) from a wall outlet into the direct current (DC) needed by the computer. The power supply also regulates the voltage and current to ensure that the computer receives the correct amount of power. The most common voltages used by computer power supplies are 3.3V, 5V, 12V, and -12V. The 3.3V and 5V are used to power the logic circuits of the computer, while the 12V and -12V are used to power the motors and other components. The power supply also provides protection against power surges and other electrical problems.
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