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Power Supply Unit (PSU)

pc

A Power Supply Unit (PSU) is a device that converts AC electrical power into DC power for a computer system.

expanded

A Power Supply Unit (PSU) is an essential component in a desktop PC that transforms alternating current (AC) from the electric grid into low-voltage direct current (DC) used by computer components. The PSU provides necessary voltage levels, commonly +3.3V, +5V, and +12V, ensuring reliable power distribution to the motherboard, storage devices, and peripherals. It plays a crucial role in the operation and stability of the computer system.

examples

A PSU rated at 600W that provides stable power to a mid-range gaming PC.

Commonly used in gaming desktops with dedicated graphics cards and multiple peripherals.

A redundant 750W PSU setup in a server to ensure continuous uptime.

Used in high-availability servers where power redundancy and reliability are critical.

related terms

Power supply
A device that provides electrical power to an electrical load, converting from one form of energy to electrical energy.
Power supply
A device that provides electrical power to an electrical load, converting from one form of energy to electrical energy.
Wattage
Wattage is the measure of electrical power expressed in watts (W).
Central Processing Unit (CPU)
A CPU is the primary component of a computer that performs most of the processing inside a computer.
Socket
A socket is a physical or virtual interface for connecting compatible computer components or peripheral devices.