The power supply unit (PSU) is the unsung hero of your PC. It silently converts the alternating current (AC) wall power from your outlet into the stable direct current (DC) voltage needed by your computer's various components. This ensures everything from the motherboard to the CPU runs smoothly. PSUs also deliver different voltage levels, and some even come with special features like quiet operation or modular cables for easier installation. Choosing the right PSU depends on the wattage requirements of your components - you don't want a weak PSU straining to deliver enough power!
