Shop PC Power Supplies at Micro Center

A great desktop PC build starts with a power supply you can rely on. Shop Micro Center's full lineup of DC power supplies here, with options from top PC brands like Corsair, MSI, Thermaltake, and many more, including the latest ATX 3.0 power supplies.

What Does a Power Supply Do?

Your power supply has one primary job — to convert your wall outlet's AC power into DC power that your desktop computer can use. Most power supplies also regulate line noise and guard against voltage spikes, which helps maintain consistent power levels and protects your PC from damage. ATX power supplies, including the latest ATX 3.0 standard, are designed to meet these requirements and provide reliable power to all components.

While a power supply unit (PSU) might not be the most exciting or glamorous part of your PC, every other component depends on it — from the motherboard to the CPU to the graphics card! In laptop computers, where the battery supplies power, the DC power supply is housed in the laptop's charger, which delivers DC power to the battery through its adapter. (Shop our lineup of laptop chargers here).

How Much Wattage Do I Need?

The hardware in your PC determines how much wattage you'll need to look for in a PSU. Most computer power supplies are rated for output between 600 to 1,000 watts under maximum load, although design or gaming PCs with power-hungry GPUs may require a higher wattage rating. For those needing a higher wattage, we carry ATX 3.0 Power Supplies featuring up to 1250W of continuous powe

Fortunately, you can put the calculator away — our PC builder makes it easy! Just add your parts, like your processor, motherboard, RAM, and hard drive, to Micro Center's PC builder tool, and we'll show you power supplies, including ATX 3.0 options, that meet or exceed your wattage needs. Then, browse our full range of power supplies to find one that delivers the perfect balance of power and 80 Plus rated efficiency.