What does PSU mean in Computing?

This page is about the meanings of the acronym/abbreviation/shorthand PSU in the field in general and in the Computing terminology in particular.

Power Supply Unit

Computing

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Definition

What does PSU mean?

Power supply unit
A power supply unit converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use a switched-mode power supply. Some power supplies have a manual selector for input voltage, while others automatically adapt to the supply voltage. Most modern desktop personal computer power supplies conform to the ATX specification, which includes form factor and voltage tolerances. While an ATX power supply is connected to the mains supply, it always provides a 5 V standby voltage so that the standby functions on the computer and certain peripherals are powered. ATX power supplies are turned on and off by a signal from the motherboard. 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. The most recent ATX PSU standard is version 2.31 of mid-2008.

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"PSU." Abbreviations.com. STANDS4 LLC, 2021. Web. 7 Mar. 2021. <https://www.abbreviations.com/term/1837185>.

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