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Large Power Supply

Power supplies are the backbone of a computer system. They convert alternating current (AC) to direct current (DC), which then powers the computer's components. Here are some great large power supplies.

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  1. Thermaltake - SMART 700W ATX 80 Plus Power Supply - Black

    SKU: J39ZPCS9KG

    Good PSU but seems to have a large number of extra connections unless you are doing a very large build. ...Good Quality, good price, easy to install, large selection of output plugs.

    Product Description

    A reliable black ATX power supply delivering 700W with 80 Plus efficiency and quiet 120mm cooling fan.
    See all Power Supplies
    Your price for this item is $54.99
    Save $5
    The previous price was $59.99

  2. CORSAIR - RMe Series RM850e 80 PLUS Gold Fully Modular Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - Black

    SKU: J39QHT23VT

    Product Description

    A fully modular black power supply with Cybenetics Gold efficiency and low-noise 120mm rifle bearing fan.
    See all Power Supplies
    Your price for this item is $124.99
    Save $20
    The previous price was $144.99

  3. CORSAIR - RMe Series RM750e 80 PLUS Gold Fully Modular Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - Black

    SKU: J39QHT23ZX

    Product Description

    A fully modular black power supply offering low-noise operation, 80 PLUS Gold efficiency, and ATX 3.1 compatibility.
    See all Power Supplies
    Your price for this item is $114.99

  4. CORSAIR - RMe Series RM1000e 80 PLUS Gold Fully Modular Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - Black

    SKU: J39QHT28XQ

    Product Description

    A fully modular black power supply offering low-noise operation, Cybenetics Gold efficiency, and ATX 3.1 compatibility.
    See all Power Supplies
    Your price for this item is $164.99
    Save $25
    The previous price was $189.99

  5. Thermaltake - Smart BM3 80+ Bronze PCIE Gen 5 ATX 3.0 850W Semi-Modular Power Supply - Black

    SKU: J39ZPC9W4P

    Product Description

    A black semi-modular 850W power supply with 80+ Bronze efficiency and PCIe Gen 5.0 support.
    See all Power Supplies
    Your price for this item is $89.99
    Save $10
    The previous price was $99.99

  6. MSI - MEG Ai1600T PCIE5 1600W ATX 3.1 & PCIe 5.1 Ready Full Modular 80 Plus Titanium Gaming Power Supply - Black

    SKU: J3P7TXSVTW

    Product Description

    A fully modular 1600W black power supply with 80 Plus Titanium efficiency and PCIe 5.1 support.
    See all Power Supplies
    Your price for this item is $677.99
    Save $92
    The previous price was $769.99

  7. Fremo - X1200 Portable Power Station (1024 Wh Capacity) - Gray

    SKU: JJGH8T42J9

    Product Description

    A gray portable power station with 1024Wh LFP battery, 1200W output, fast charging, and built-in UPS.
    See all Solar Generators & Power Banks
    Your price for this item is $799.99

  8. Thermaltake - Toughpower GT 1200W 80+ Gold ATX 3.1 Power Supply - Black

    SKU: J39TQXRSQL

    Product Description

    A fully modular black power supply delivering 1200W, 80 Plus Gold efficiency, and ATX 3.1 compatibility.
    See all Power Supplies
    Your price for this item is $149.99
    Save $30
    The previous price was $179.99

  9. Rotel - RMB-1555 120W 5-Ch Multi-Channel Amplifier - Silver

    SKU: JXPXZ6JZXW

    Product Description

    A silver multi-channel amplifier delivering 120W per channel with fan cooling and superior sound quality.
    See all Power Amplifiers
    Your price for this item is $2,499.00

  10. Rotel - RMB-1555 120W 5-Ch Multi-Channel Amplifier - Black

    SKU: JXPXZSKZX6

    Product Description

    A powerful black multi-channel amplifier delivering 120W per channel for immersive home theater audio experiences.
    See all Power Amplifiers
    Your price for this item is $2,499.00
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In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.