A power supply unit (PSU) is an electronic device that supplies electric power to an electrical load. The primary function of a PSU is to convert alternating current (AC) from a wall outlet to direct current (DC) to power the internal components of a computer.

A power supply typically has a series of connectors that can be used to power multiple devices in a computer system. The most common connectors are the 24-pin connector used to power the motherboard and the 4-pin connector used to power the CPU.

Modern power supplies also include a number of advanced features, such as …