A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. ... They also provide a signal to the motherboard to indicate when the DC voltages are in spec, so that the computer is able to safely power up and boot.
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Answer:
A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. ... They also provide a signal to the motherboard to indicate when the DC voltages are in spec, so that the computer is able to safely power up and boot.
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