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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.

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  1. CORSAIR - RMe Series RM1200e 80 PLUS Gold Fully Modular Low-Noise ATX 3.1 and PCIE 5.0 Power Supply - Black

    SKU: J39QHT2RCL

    Love best buy products...love it...works fantastic no issues during install, price was great.

    Product Description

    A fully modular black power supply offering 1200W, low-noise operation, and 80 PLUS Gold efficiency.
    See all Power Supplies
    Your price for this item is $234.99
  2. CORSAIR - HXi Series HX1200i 80 PLUS Platinum Fully Modular Ultra Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - Black

    SKU: J39TSCHTLL

    Works great for my 5090. Would definitely recommend...Best efficiency...Works Great

    Product Description

    A fully modular black power supply offering 80 PLUS Platinum efficiency and ultra-low-noise fluid dynamic fan.
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    Your price for this item is $344.99
  3. CORSAIR - HXi Series HX1500i 80 PLUS Platinum Fully Modular Ultra Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - Black

    SKU: J39TSCHW9V

    ICue monitoring is great - show you how much power it is consuming from the mains supply vs the board...Great product.

    Product Description

    A fully modular black power supply with ultra-low noise, 80 PLUS Platinum efficiency, and digital monitoring.
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    Your price for this item is $389.99
  4. PCCOOLER - YS1200 1200W 80 Plus Gold Certified Fully Modular PCIe 5.1 & ATX 3.1 Gaming Power Supply - Black

    SKU: CZ92Y4Z4HS

    Product Description

    A fully modular black power supply with 80 Plus Gold efficiency, PCIe 5.1, and silent hybrid fan.
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    Your price for this item is $219.99
  5. 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.
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    Your price for this item is $151.49
    Save $38
    The previous price was $189.99
  6. CORSAIR - HXi Series 1000W 80 Plus Cybenetics Platinum Fully Modular Ultra-Low Noise ATX Power Supply - Black

    SKU: J39QHT2QK7

    Great product!...Great quality and runs well!...Best to not cheap out on an important part so this is a very safe option....Great and best price

    Product Description

    A fully modular black ATX power supply with 1000W Platinum efficiency and ultra-low noise operation.
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    Your price for this item is $234.99
    Save $55
    The previous price was $289.99
  7. Thermaltake - Toughpower GF A3 1200W 80 PLUS Gold PCIe Gen 5 ATX 3.0 Ready Fully Modular Power Supply - Black

    SKU: J39ZPC9H3L

    The best of the Best...Overall, this power supply offers great value for the price, reliability, and efficiency....Working well in our gaming pc. needed the best power supply for the 5090 card that could...

    Product Description

    A fully modular black power supply with 1200W output, 80 PLUS Gold efficiency, and PCIe Gen 5 support.
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    Your price for this item is $149.99
    Save $50
    The previous price was $199.99
  8. Thermaltake - Toughpower GF A3 1050W 80+ Gold PCIe Gen 5 ATX 3.1 Fully Modular Power Supply - Snow

    SKU: J39ZPC9KPW

    A very good PSU with great voltage. It was also very easy to use.

    Product Description

    A fully modular white and gold ATX 3.1 power supply with 1050W output and PCIe Gen 5 support.
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    Your price for this item is $119.99
    Save $50
    The previous price was $169.99
  9. 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.
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    Your price for this item is $129.99
    Save $50
    The previous price was $179.99
  10. Super Flower - Leadex VIII Platinum PRO 1200W ATX 3.1&PCIe 5.1(Native 12V-2x6 Cable), Cybenetics PLATINUM, Smallest 125mm ATX PSU - Black

    SKU: C34528PHY5

    Product Description

    A fully modular black ATX power supply with Cybenetics Platinum efficiency and native PCIe 5.1 support.
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    Your price for this item is $189.99
    Save $10
    The previous price was $199.99

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.