Power supply unit
lastmod 2016-06-03created 2016-06-031 edits
A power supply unit (Power supply unit) is a subcategory of power supplies, referring to a device that supplies the power needed to run a computer.
The power supplied to homes is generally AC, while the electronic components used in computers need DC power, so a device that converts AC to DC is required; the computer's power supply unit plays this role. (English abbreviation PSU)
Computer components require specific DC voltages such as 12V, 5V, and 3.3V, so the basic goal of a power supply unit is to convert the 220V AC input power into DC power at these voltages.