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400w power supply

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Best Buy customers often prefer the following products when searching for 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.

Main Results
  1. CORSAIR - 2’ Premium Individually Sleeved 12+4pin PCIe Gen 5 Type-4 600W 12VHPWR Cable - Black - Front_Zoom
    Top comment

    "Its a good alternative for power supplies that do no have a 12VHP connection....Powers up FE 3080 no problem...Worked great to power up a new to me Founders Edition 3080."

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    Product Description

    For those who want to connect the latest PCIe 5.0 GPUs without creating extra clutter, the official CORSAIR Premium Individually Sleeved 600W PCIe 5.0 / Gen 5 12VHPWR PSU Cable is a must-have for modern PC builds. This premium cable reliably delivers power from a CORSAIR Type-4 PSU to the most advanced PCIe Gen 5 graphics cards, without the need for a 12+4pin adapter. The cable is usable with any Type-4 CORSAIR power supply via a dual 8-pin PCIe connection. Each flexible triple mesh paracord cable is individually sleeved and held together by an adjustable, interconnecting cable comb, adding a clean, professional look to your build.
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    Top comment

    "Its a good alternative for power supplies that do no have a 12VHP connection....Powers up FE 3080 no problem...Worked great to power up a new to me Founders Edition 3080."

    See all customer reviews

    Product Description

    For those who want to connect the latest PCIe 5.0 GPUs without creating extra clutter, the official CORSAIR Premium Individually Sleeved 600W PCIe 5.0 / Gen 5 12VHPWR PSU Cable is a must-have for modern PC builds. This premium cable reliably delivers power from a CORSAIR Type-4 PSU to the most advanced PCIe Gen 5 graphics cards, without the need for a 12+4pin adapter. The cable is usable with any Type-4 CORSAIR power supply via a dual 8-pin PCIe connection. Each flexible triple mesh paracord cable is individually sleeved and held together by an adjustable, interconnecting cable comb, adding a clean, professional look to your build.
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    See all Power Supplies
  2. CORSAIR - CX-M Series CX750M Semi-Modular Low-Noise ATX Power Supply - Black - Front_Zoom
    Top comment

    "Great Power Supply...Powers system with no problem....Power Supply...Worked great, powers 6 1660supers, MOBO, and my CPU without issues."

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    Product Description

    CORSAIR CX-M Series Low-Noise Power Supplies offer 80 PLUS Bronze efficiency and semi-modular cabling for reliable, low-noise operation. With Dual EPS12V cables and two/four PCIe 8-pin power connectors, CX-M PSUs have all the connections needed to power today’s most demanding PC upgrades. Japanese 105°C-rated capacitors deliver superb electrical performance and reliability for your system, backed by a five-year warranty. Robust DC-DC conversion ensures clean, consistent power for all your components and peripherals. With a compact 140mm size allowing for great flexibility in build configurations, CX-M Series power supplies deliver reliable power for nearly any build.
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    Top comment

    "Great Power Supply...Powers system with no problem....Power Supply...Worked great, powers 6 1660supers, MOBO, and my CPU without issues."

    See all customer reviews

    Product Description

    CORSAIR CX-M Series Low-Noise Power Supplies offer 80 PLUS Bronze efficiency and semi-modular cabling for reliable, low-noise operation. With Dual EPS12V cables and two/four PCIe 8-pin power connectors, CX-M PSUs have all the connections needed to power today’s most demanding PC upgrades. Japanese 105°C-rated capacitors deliver superb electrical performance and reliability for your system, backed by a five-year warranty. Robust DC-DC conversion ensures clean, consistent power for all your components and peripherals. With a compact 140mm size allowing for great flexibility in build configurations, CX-M Series power supplies deliver reliable power for nearly any build.
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    See all Power Supplies
  3. Thermaltake - SMART 700W ATX 80 Plus Power Supply - Black - Front_Zoom

    Model: PS-SPD-0700NPCWUS-1
    SKU: 6339087
    Top comment

    "It's a power supply. Powers stuff....It does its job. Power supplies don't turn me on, just the computer....Power supply...This product powers my computer without any issues."

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    Product Description

    Power up gaming desktops with this Thermaltake Smart power supply. A continuous 700W power output keeps demanding computer setups energized, while the industry-grade power, voltage and short-circuit protections safeguard sensitive components. This Thermaltake Smart power supply has an embedded 120mm cooling fan that disperses heat efficiently without producing distracting noise.
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    Top comment

    "It's a power supply. Powers stuff....It does its job. Power supplies don't turn me on, just the computer....Power supply...This product powers my computer without any issues."

    See all customer reviews

    Product Description

    Power up gaming desktops with this Thermaltake Smart power supply. A continuous 700W power output keeps demanding computer setups energized, while the industry-grade power, voltage and short-circuit protections safeguard sensitive components. This Thermaltake Smart power supply has an embedded 120mm cooling fan that disperses heat efficiently without producing distracting noise.
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    See all Power Supplies
  4. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black - Front_Zoom
    Top comment

    "Amazing power supply, it’s quiet and powers my 3060 easily...Powers everything and all looks good! My favorite brand of power supplies. "

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    Product Description

    CORSAIR RM850x Series power supplies with EPS12V connectors are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC. RM850x PSUs use only Japanese 105°C capacitors, for long life and reliability backed by a ten-year warranty. A 135mm magnetic levitation bearing fan ensures high performance coupled with low noise. Wake your computer faster and consume less power with support for Modern Standby sleep mode. Zero RPM mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you need only connect the cables your system requires. An RM850x PSU is quiet, efficient and dependable enough to power your high-performance PC for years to come.
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    Top comment

    "Amazing power supply, it’s quiet and powers my 3060 easily...Powers everything and all looks good! My favorite brand of power supplies. "

    See all customer reviews

    Product Description

    CORSAIR RM850x Series power supplies with EPS12V connectors are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC. RM850x PSUs use only Japanese 105°C capacitors, for long life and reliability backed by a ten-year warranty. A 135mm magnetic levitation bearing fan ensures high performance coupled with low noise. Wake your computer faster and consume less power with support for Modern Standby sleep mode. Zero RPM mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you need only connect the cables your system requires. An RM850x PSU is quiet, efficient and dependable enough to power your high-performance PC for years to come.
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    See all Power Supplies
  5. CORSAIR - RMx Series RM1000x 80 PLUS Gold Fully Modular ATX Power Supply - Black - Front_Zoom
    Top comment

    "Great Power Supply...This powers my 5950x and 3090 without issue. I went with after market cables, but everything looks great and supplies more than enough power....a powerful little power supply...this power supply does what it needs to do it powers my PC well and future proofs it i guess"

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    Product Description

    CORSAIR RM1000x Series power supplies with EPS12V connectors are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC. RM1000x PSUs use only Japanese 105°C capacitors, for long life and reliability backed by a ten-year warranty. A 135mm magnetic levitation bearing fan ensures high performance coupled with low noise. Wake your computer faster and consume less power with support for Modern Standby sleep mode. Zero RPM mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you need only connect the cables your system requires. An RM1000x PSU is quiet, efficient and dependable enough to power your high-performance PC for years to come.
    See all Power Supplies
    Top comment

    "Great Power Supply...This powers my 5950x and 3090 without issue. I went with after market cables, but everything looks great and supplies more than enough power....a powerful little power supply...this power supply does what it needs to do it powers my PC well and future proofs it i guess"

    See all customer reviews

    Product Description

    CORSAIR RM1000x Series power supplies with EPS12V connectors are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC. RM1000x PSUs use only Japanese 105°C capacitors, for long life and reliability backed by a ten-year warranty. A 135mm magnetic levitation bearing fan ensures high performance coupled with low noise. Wake your computer faster and consume less power with support for Modern Standby sleep mode. Zero RPM mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you need only connect the cables your system requires. An RM1000x PSU is quiet, efficient and dependable enough to power your high-performance PC for years to come.
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    See all Power Supplies
  6. Thermaltake - Toughpower GF A3 1050W 80 PLUS Gold PCIe Gen 5 ATX 3.0 Ready Fully Modular Power Supply - Black - Front_Zoom
    Top comment

    "Beat power aupply...Beat power supply , no sound on fans , smart fan option...very good quality and power. no need to but anything else"

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    Product Description

    Toughpower GF A3 series is 80 PLUS Gold certified and compatible with Intel’s ATX 3.0 specifications. Designed with a native PCIe Gen 5.0 connector, it can power up next-gen technology with one new 12VHPWR cable.
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    Top comment

    "Beat power aupply...Beat power supply , no sound on fans , smart fan option...very good quality and power. no need to but anything else"

    See all customer reviews

    Product Description

    Toughpower GF A3 series is 80 PLUS Gold certified and compatible with Intel’s ATX 3.0 specifications. Designed with a native PCIe Gen 5.0 connector, it can power up next-gen technology with one new 12VHPWR cable.
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    See all Power Supplies
  7. CORSAIR - HXi Series HX1200i 80 PLUS Platinum Cybenetics Platinum Fully Modular ATX Power Supply - Black - Front_Zoom

    Product Description

    CORSAIR HXi Series Fully Modular Ultra-Low Noise Power Supplies deliver exceptional 80 PLUS Platinum efficient power and low-noise fluid dynamic bearing fan performance. ATX 3.0 and PCIe 5.0 compliance, HXi PSUs have every connection needed to power today’s most demanding PC upgrades. Powerful CORSAIR iCUE software enables custom fan curves, monitoring and adjusting power settings, and more thanks to a fully digital platform. Japanese 105°C-rated electrolytic capacitors deliver long life and reliability, backed by a ten-year warranty. Wake your computer faster and consume less power with Modern Standby sleep mode. Zero RPM mode ensures near-silent operation at low and medium loads. The HXi Series puts platinum power at your command.
    See all Power Supplies

    Product Description

    CORSAIR HXi Series Fully Modular Ultra-Low Noise Power Supplies deliver exceptional 80 PLUS Platinum efficient power and low-noise fluid dynamic bearing fan performance. ATX 3.0 and PCIe 5.0 compliance, HXi PSUs have every connection needed to power today’s most demanding PC upgrades. Powerful CORSAIR iCUE software enables custom fan curves, monitoring and adjusting power settings, and more thanks to a fully digital platform. Japanese 105°C-rated electrolytic capacitors deliver long life and reliability, backed by a ten-year warranty. Wake your computer faster and consume less power with Modern Standby sleep mode. Zero RPM mode ensures near-silent operation at low and medium loads. The HXi Series puts platinum power at your command.
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    See all Power Supplies
  8. CORSAIR - HXi Series 1500W 80 Plus Platinum Fully-Modular Ultra-Low Noise ATX Power Supply - Black - Front_Zoom
    Top comment

    "INFINITE POWER...Decided to upgrade since my old power supply only got me to 60hz which is dog water, complete doo doo was running my 3060 so i decided to upgrade and now my games load faster and my pc finally can have STAND POWER!...Amazing platinum power"

    See all customer reviews

    Product Description

    CORSAIR HXi Series Fully Modular Ultra-Low Noise Power Supplies deliver exceptional 80 PLUS Platinum efficient power and low-noise fluid dynamic bearing fan performance. ATX 3.0 and PCIe 5.0 compliance, HXi PSUs have every connection needed to power today’s most demanding PC upgrades. Powerful CORSAIR iCUE software enables custom fan curves, monitoring and adjusting power settings, and more thanks to a fully digital platform. Japanese 105°C-rated electrolytic capacitors deliver long life and reliability, backed by a tenyear warranty. Wake your computer faster and consume less power with Modern Standby sleep mode. Zero RPM mode ensures near-silent operation at low and medium loads. The HXi Series puts platinum power at your command.
    See all Power Supplies
    Top comment

    "INFINITE POWER...Decided to upgrade since my old power supply only got me to 60hz which is dog water, complete doo doo was running my 3060 so i decided to upgrade and now my games load faster and my pc finally can have STAND POWER!...Amazing platinum power"

    See all customer reviews

    Product Description

    CORSAIR HXi Series Fully Modular Ultra-Low Noise Power Supplies deliver exceptional 80 PLUS Platinum efficient power and low-noise fluid dynamic bearing fan performance. ATX 3.0 and PCIe 5.0 compliance, HXi PSUs have every connection needed to power today’s most demanding PC upgrades. Powerful CORSAIR iCUE software enables custom fan curves, monitoring and adjusting power settings, and more thanks to a fully digital platform. Japanese 105°C-rated electrolytic capacitors deliver long life and reliability, backed by a tenyear warranty. Wake your computer faster and consume less power with Modern Standby sleep mode. Zero RPM mode ensures near-silent operation at low and medium loads. The HXi Series puts platinum power at your command.
    See all Power Supplies
    See all Power Supplies
  9. Thermaltake - Smart BM3 80+ Bronze  PCIE Gen 5 ATX 3.0 650W Semi-Modular Power Supply - Black - Front_Zoom

    Product Description

    Power Up the Next Generation Hardware. Smart BM3 80 PLUS Bronze certified semi modular power supply unit is designed to meet ATX 3.0 standards, it also comes with one PCIe Gen 5.0 (12VHPWR) connector to support modern graphics cards. With an ample 5-year warranty, the Smart BM3 series is able to satisfy the market, where value-oriented users are looking for a new power supply with all the latest features.
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    Product Description

    Power Up the Next Generation Hardware. Smart BM3 80 PLUS Bronze certified semi modular power supply unit is designed to meet ATX 3.0 standards, it also comes with one PCIe Gen 5.0 (12VHPWR) connector to support modern graphics cards. With an ample 5-year warranty, the Smart BM3 series is able to satisfy the market, where value-oriented users are looking for a new power supply with all the latest features.
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    See all Power Supplies
  10. NZXT - C 1500W  ATX 3.1 80 Plus Platinum Modular Power Supply - Black - Front_Zoom

    Product Description

    Achieve peak PC performance with the NZXT C1500 Platinum PSU, offering continuous, digitally-controlled power with outstanding efficiency and precise regulation.
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    Product Description

    Achieve peak PC performance with the NZXT C1500 Platinum PSU, offering continuous, digitally-controlled power with outstanding efficiency and precise regulation.
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    See all Power Supplies
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