Power Supply Unit (PSU)

A Power Supply Unit (PSU) is an essential component of a computer that converts alternating current (AC) from a wall outlet into direct current (DC) used by the computer's internal components. It provides the necessary power to the motherboard, processor, graphics card, and other peripherals, ensuring stable and reliable operation. PSUs come in various wattages and efficiency ratings, and their quality can significantly impact system performance and longevity.