4th of July SaleEnds Sunday. Limited quantities. No rainchecks.Shop now

Skip to contentGo to Product Search
Main Content
Categories & Filters
Best Buy

/

computer cards & components

/

power supplies

Largest Computer Power Supply

A power supply is an electrical device that supplies electric power to an electrical load. It is one of the most important components in a computer, because it is what provides the power to all of the other components. Browse the top-ranked list of largest computer power supplies below along with associated reviews and opinions.

Read More
Results
Main Results

  1. CORSAIR - HXi Series HX1200i 80 PLUS Platinum Fully Modular Ultra Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - Black

    SKU: J39TSCHTLL

    Product Description

    A fully modular black power supply offering 80 PLUS Platinum efficiency and ultra-low-noise fluid dynamic fan.
    See all Power Supplies
    Your price for this item is $344.99

  2. Thermaltake - Toughpower GT 1200W ATX 3.1 PCIe 5.1 Full Modular Gold 80+ 140mm Snow

    SKU: J39TQXRSF8

    Product Description

    A fully modular white ATX power supply with 1200W output, 80 Plus Gold efficiency, and PCIe 5.1 support.
    See all Power Supplies
    Your price for this item is $179.99
    Save $10
    The previous price was $189.99

  3. SilverStone - HELA 2050R Platinum SST-HA2050R-PM Cybenetics Platinum 2050W ATX 3.0 & PCIe 5.0 Fully Modular ATX Power Supply - Black

    SKU: J36P263Q4Q

    Product Description

    A fully modular black ATX power supply delivering 2050W with Cybenetics Platinum efficiency and PCIe 5.0 support.
    See all Power Supplies
    Your price for this item is $738.28

  4. SilverStone - HELA 1300R Platinum Cybenetics Platinum 1300W ATX 3.0 & PCIe 5.0 Fully Modular ATX Power Supply - Black

    SKU: J36P263HC9

    Product Description

    A fully modular black ATX power supply with 1300W output, Cybenetics Platinum efficiency, and PCIe 5.0 support.
    See all Power Supplies
    Your price for this item is $305.99

  5. Thermaltake - Toughpower GF A3 1050W 80 PLUS Gold PCIe Gen 5 ATX 3.0 Ready Fully Modular Power Supply - Black

    SKU: J39ZPC9RKV

    Excellent power supply with lots of modular cabling options including the new connector for the latest GPUs. ...Works great computer stopped power off after I bought it...Excellent power supply...Power...

    Product Description

    A fully modular black power supply with 80 PLUS Gold efficiency and PCIe Gen 5.0 compatibility.
    See all Power Supplies
    Your price for this item is $169.99

  6. Thermaltake - Toughpower GF A3 1200W 80 PLUS Gold PCIe Gen 5 ATX 3.0 Ready Fully Modular Power Supply - Black

    SKU: J39ZPC9H3L

    Product Description

    A fully modular black power supply with 1200W output, 80 PLUS Gold efficiency, and PCIe Gen 5 support.
    See all Power Supplies
    Your price for this item is $149.99
    Save $50
    The previous price was $199.99

  7. Thermaltake - Toughpower GF A3 1050W 80+ Gold PCIe Gen 5 ATX 3.1 Fully Modular Power Supply - Snow

    SKU: J39ZPC9KPW

    Product Description

    A fully modular white and gold ATX 3.1 power supply with 1050W output and PCIe Gen 5 support.
    See all Power Supplies
    Your price for this item is $149.99
    Save $20
    The previous price was $169.99

  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 $162.99
    Save $17
    The previous price was $179.99

  9. SilverStone - ST1200-PTS 1200 Watt Fully Modular 80 Plus Ultra Compact 140MM in Depth Platinum Power Supply - Black

    SKU: J36P263SPX

    Product Description

    A fully modular black power supply delivering 1200 watts and 80 PLUS Platinum energy efficiency.
    See all Power Supplies
    Your price for this item is $303.99

  10. SilverStone - SST-EX1200R-PL Extreme 1200R Platinum Cybenetics Platinum 1200W PCIe 5 Fully Modular SFX-L Power Supply - Black

    SKU: J36P263TVW

    Product Description

    A fully modular black SFX-L power supply with 1200W output, PCIe 5.0 support, and Platinum efficiency.
    See all Power Supplies
    Your price for this item is $440.53
1-18 of 176 items
0 items

Best Sellers

Related Pages

FAQ

High-capacity computer power supplies usually come with a variety of connectors, including multiple PCIe cables for graphics cards, SATA connectors for storage devices, Molex connectors for legacy components, and a 24-pin ATX connector for the motherboard.

Yes, most large computer power supplies are designed to be compatible with both standard ATX and extended ATX (E-ATX) motherboards, providing the necessary power and connectors for high-performance systems.

Many high-wattage power supplies feature fully modular or semi-modular cabling, allowing users to connect only the cables they need for a cleaner and more organized build.

Yes, large power supplies are often designed to support multi-GPU configurations, providing sufficient wattage and multiple PCIe power connectors for demanding graphics setups.

High-capacity computer power supplies are commonly available with 80 PLUS certifications, such as Bronze, Silver, Gold, Platinum, or Titanium, indicating their energy efficiency and performance under load.