POWER SUPPLY
A power supply unit (PSU) is a hardware device that converts AC electricity into DC electricity and then distributes it to the rest of the computer. On a standard desktop computer, the PSU is where the power cord plugs into and usually has an I/O power switch on it.
Power supply units (PSUs) typically sit at the top of the case; this is why the computer's power cable usually plugs into the top-back section of the case.
The main function of the power supply in a computer is to convert electric current from a source to the correct voltage, current, and frequency to power the load.
COMPONENTS
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