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400w Power Supply

The power supply is a crucial component of any computer. It's the part that converts AC current from the wall outlet into DC current that your computer's components can use. It also has to be able to handle the load from all of those components, especially if you're overclocking, which means you'll want a power supply with a high-quality fan and top-notch electrical components. We're confident our top picks are the best you can buy for your own system.

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  1. Sonance - 8-50 AMP - 400W 8.0 Ch. Multi-Channel Amplifier for Home Audio & Multi Room Systems (Each) - Black

    SKU: J78WL7S4TT

    Product Description

    A black multi-channel amplifier delivering 400W of high-fidelity sound for seamless whole-home audio integration.
    See all Power Amplifiers
    Your price for this item is $1,485.00

  2. Cobra - PURE SINE 400 Watt Power Inverter with Fast Charge USB - Black

    SKU: J7XH3ZFX5Q

    Product Description

    A black power inverter delivering 400 watts of pure sine wave power with fast-charge USB for sensitive electronics.
    See all Power Inverters
    Your price for this item is $130.00

  3. Anker - SOLIX PS400 Portable Solar Panel 400W - Black

    SKU: JJ8586KW5T

    Product Description

    A portable, foldable black solar panel delivering 400W of efficient, sustainable energy for outdoor power needs.
    See all Solar Panels
    Your price for this item is $699.99

  4. Renogy - 400W Portable Solar Panel Foldable Solar Blanket, for Power Station Outdoor Camping RV Solar Generator - Black

    SKU: J39HF8558L

    Product Description

    A portable black solar panel blanket delivering 400W of rapid, eco-friendly charging for outdoor adventures.
    See all Solar Panels
    Your price for this item is $409.38
    Save $60
    The previous price was $469.99
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FAQ

A 400W power supply is suitable for entry-level to mid-range desktop computers, small form-factor PCs, and basic workstations. It can support components like integrated graphics or low-power dedicated GPUs, as well as standard hard drives and SSDs.

Many 400W power supplies come in both modular and non-modular options. Modular power supplies allow you to connect only the cables you need, helping with cable management and airflow inside your PC case.

Yes, most 400W power supplies include the latest ATX connectors, such as 24-pin main power and 8-pin CPU power connectors, making them compatible with current-generation motherboards.

A 400W power supply is an excellent choice for a home theater PC, as these systems typically require less power and benefit from the efficiency and quiet operation of lower-wattage PSUs.

Look for certifications like 80 PLUS Bronze, Silver, or Gold, which indicate higher energy efficiency and reliable performance. These certifications ensure that the power supply meets specific efficiency standards under typical loads.