"Power supplies come in many shapes and sizes, including varying wattages, but how do you know how much wattage you need? Well that all depends on what you're doing, if it's a basic computer for surfing the internet and doing other office like tasks, you really don't need any of those popular large wattage power supplies out there today. Today for review I've got the Glacial Power 550Watt power supply, it's silent, and more than capable of handling a basic everyday computer... "