Power Supply
The power supply as its
name might suggest is the device that supplies power to all the components in
the computer. Its case holds a transformer, voltage control, and (usually) a
cooling fan. The power supply converts about 100-120 volts of AC power to
low-voltage DC power for the internal components to use. The most common
computer power supplies are built to conform with the ATX form factor. This
enables different power supplies to be interchangeable with different components
inside the computer. ATX power supplies also are designed to turn on and off
using a signal from the motherboard, and provide support for modern functions
such as standby mode.
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