A power supply is the part of the computer that provides electricity to the computer which allows it to function. It has a fan which cools it and prevents it from overheating, which is when it gets too hot and turns off. It connects to the motherboard and other drives. When purchasing a power supply, be mindful of its wattage. A higher wattage means you can connect more devices to the power supply.

Higher wattage means you will be able to use every port on the motherboard or every drive bay.

Modular Power Supply reduces the amount of clutter in a case by removing unused cables. However, they may create electrical resistance.