Power supplies are important for any electrical or electronic device to run properly, especially a computer. The right power delivery device for computers or PCs is critically important as well. A computer power supply unit works by converting the alternating current (AC) into a regulated low-voltage direct current (DC). This is essential for the internal components of the computer to function without any issues. The DC power supplies a signal to the motherboard to communicate that it is safe to boot, thus keeping the computer protected. Explore a range of branded power supply units for PCs at PartsMine. Get high quality power devices to depend upon. Shop today. Your order ships quick with an estimated delivery time of 3 business days or less.