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Best Buy customers often prefer the following products when searching for best computer power supplies.

A power supply is an electrical component that supplies electric energy to a load. It is one of the most important parts of a computer system, as it provides the power to all other components. Browse the top-ranked list of best computer power supplies below along with associated reviews and opinions.

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

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

    "great power supply...I bought this for computer and my friend got one also. The power supply didn't fit my computer tower. ...Thermalake computer power supply...Thermalake makes quality power supplies. I have used them for many computers."

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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

    "great power supply...I bought this for computer and my friend got one also. The power supply didn't fit my computer tower. ...Thermalake computer power supply...Thermalake makes quality power supplies. I have used them for many computers."

    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.
    See all Power Supplies
    See all Power Supplies
  2. CORSAIR - RMx Series RM1000x 80 PLUS Gold Fully Modular ATX Power Supply - Black - Front_Zoom
    Top comment

    "The best...Best Power Supply I have ever bought. Perfect for high end PCs...Works well for office computers and also high powered gaming PCs - able to supply adequate power."

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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

    "The best...Best Power Supply I have ever bought. Perfect for high end PCs...Works well for office computers and also high powered gaming PCs - able to supply adequate power."

    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.
    See all Power Supplies
    See all Power Supplies
  3. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black - Front_Zoom
    Top comment

    "One of the most reliable brands for computer components. Tried and true. Twenty years of building computers and not a single Corsair power supply has failed on me. ...Power support for computer...Worked great definitely recommend, installed and got my computer back up and running"

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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

    "One of the most reliable brands for computer components. Tried and true. Twenty years of building computers and not a single Corsair power supply has failed on me. ...Power support for computer...Worked great definitely recommend, installed and got my computer back up and running"

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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.
    See all Power Supplies
    See all Power Supplies
  4. CORSAIR - RM Series RM850 850W ATX 80 PLUS GOLD Certified Fully Modular Power Supply - White - Front_Zoom
    Top comment

    "Great power supply...This power supply is great! It works well for the price and I had no trouble installing it into my PC. ...Best Buy deal on this made me buy it instantly. Great power supply white for white pc build amazing quality"

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    Product Description

    CORSAIR RM Series Fully Modular Ultra-Low Noise Power Supplies deliver consistent 80 PLUS Gold efficient power to your PC. With triple EPS12V cables and four PCIe 8-pin power connectors, RM PSUs have all the connections needed to power today’s most demanding PC upgrades. Industrial-grade, 105°C-rated capacitors deliver superb electrical performance and reliability, backed by a ten-year warranty. Wake your computer faster and consume less power with support for the Modern Standby sleep mode. Zero RPM fan mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you connect only the cables your system requires. RM PSUs are quiet, efficient, and dependable to power your high-performance PC for years to come.
    See all Power Supplies
    Top comment

    "Great power supply...This power supply is great! It works well for the price and I had no trouble installing it into my PC. ...Best Buy deal on this made me buy it instantly. Great power supply white for white pc build amazing quality"

    See all customer reviews

    Product Description

    CORSAIR RM Series Fully Modular Ultra-Low Noise Power Supplies deliver consistent 80 PLUS Gold efficient power to your PC. With triple EPS12V cables and four PCIe 8-pin power connectors, RM PSUs have all the connections needed to power today’s most demanding PC upgrades. Industrial-grade, 105°C-rated capacitors deliver superb electrical performance and reliability, backed by a ten-year warranty. Wake your computer faster and consume less power with support for the Modern Standby sleep mode. Zero RPM fan mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you connect only the cables your system requires. RM PSUs are quiet, efficient, and dependable to power your high-performance PC for years to come.
    See all Power Supplies
    See all Power Supplies
  5. MSI - NVIDIA GeForce RTX 3060 Ventus 3X 12G OC - 12GB GDDR6 - PCI Express 4.0 - Graphics Card - Black - Front_Zoom
    Top comment

    "Best for streaming...Computer...My grandson really enjoys working on computers"

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    Product Description

    The NVIDIA GeForce RTX 3060 is powered by Ampere—NVIDIA's 2nd gen RTX architecture. Built with enhanced RT Cores and Tensor Cores, new streaming multiprocessors, and high-speed G6 memory, it gives you the power you need to rip through the most demanding games. VENTUS brings a performance-focused design that maintains the essentials to accomplish any task at hand. Rocking a trusted dual fan arrangement laid into a rigid industrial design lets this sharp looking graphics card fit into any build. TORX Fan 3.0: The award-winning MSI TORX Fan 3.0 design creates high static pressure and pushes the limits of thermal performance. Core Pipe: Precision-crafted heat pipes ensure max contact to the GPU and spread heat along the full length of the heatsink.
    See all GPUs / Video Graphics Cards
    Top comment

    "Best for streaming...Computer...My grandson really enjoys working on computers"

    See all customer reviews

    Product Description

    The NVIDIA GeForce RTX 3060 is powered by Ampere—NVIDIA's 2nd gen RTX architecture. Built with enhanced RT Cores and Tensor Cores, new streaming multiprocessors, and high-speed G6 memory, it gives you the power you need to rip through the most demanding games. VENTUS brings a performance-focused design that maintains the essentials to accomplish any task at hand. Rocking a trusted dual fan arrangement laid into a rigid industrial design lets this sharp looking graphics card fit into any build. TORX Fan 3.0: The award-winning MSI TORX Fan 3.0 design creates high static pressure and pushes the limits of thermal performance. Core Pipe: Precision-crafted heat pipes ensure max contact to the GPU and spread heat along the full length of the heatsink.
    See all GPUs / Video Graphics Cards
    See all GPUs / Video Graphics Cards
  6. 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...Actually the best and fixed my issue and makes all my pc part work great together. "

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    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...Actually the best and fixed my issue and makes all my pc part work great together. "

    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
  7. Crucial - 32GB Kit (2x16GB) DDR5 5600MHz C46 SODIMM Laptop Memory - Black - Front_Zoom
    Top comment

    "I'm surprised that any modern computer is coming with 8 gigs of ram as its not really adequate for a modern computer. ...And currently, it's in my mini-PC by Beelink (SER7) running happily at full-speed again. "

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    Product Description

    Crucial® DDR5 Memory has the blazing speed and massive bandwidth needed for the next generation of multi-core CPUs. This innovative technology empowers your system to multitask better, load, analyze, edit, and render faster, game with higher frame rates, uncover data insights faster, enhance productivity to save time and money, significantly reduce lag for heavy workloads and optimize power efficiency over the previous generation. Crucial DDR5 Memory can enable your computer to harness performance that was once only possible with extreme performance memory.
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    Top comment

    "I'm surprised that any modern computer is coming with 8 gigs of ram as its not really adequate for a modern computer. ...And currently, it's in my mini-PC by Beelink (SER7) running happily at full-speed again. "

    See all customer reviews

    Product Description

    Crucial® DDR5 Memory has the blazing speed and massive bandwidth needed for the next generation of multi-core CPUs. This innovative technology empowers your system to multitask better, load, analyze, edit, and render faster, game with higher frame rates, uncover data insights faster, enhance productivity to save time and money, significantly reduce lag for heavy workloads and optimize power efficiency over the previous generation. Crucial DDR5 Memory can enable your computer to harness performance that was once only possible with extreme performance memory.
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    See all Memory (RAM)
  8. CORSAIR - SF-L Series SF850L 80 Plus Gold Fully Modular ATX Power Supply - Black - Front_Zoom
    Top comment

    "I had such a good experience with the power supply(the only part on the old pc that I hand had to replace at some point) that I had to buy it again when it met its unfortunate demise. ...Power supply...Building a mini PC so needed a smaller power supply. This fit perfect."

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    Product Description

    CORSAIR SF-L Series Fully Modular SFX Power Supplies with ATX 3.0 and PCIe 5.0 compliance provide the continuous high wattages demanded by the latest PC hardware, all in a space-saving SFX-L form-factor. Micro-fit PSU connectors and fully modular, flexible cables enable a tidy and compact build, even for exceedingly powerful systems. A 120mm rifle bearing PWM fan deploys Zero RPM mode at lower loads for exceptionally quiet performance. Japanese 105°C-rated electrolytic capacitors deliver long life and reliability, backed by a seven-year warranty. Wake your computer faster and consume less power with Modern Standby sleep mode. For high-wattage, 80 PLUS Gold power in a compact profile, the SF-L Series is your small form X-factor.
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    Top comment

    "I had such a good experience with the power supply(the only part on the old pc that I hand had to replace at some point) that I had to buy it again when it met its unfortunate demise. ...Power supply...Building a mini PC so needed a smaller power supply. This fit perfect."

    See all customer reviews

    Product Description

    CORSAIR SF-L Series Fully Modular SFX Power Supplies with ATX 3.0 and PCIe 5.0 compliance provide the continuous high wattages demanded by the latest PC hardware, all in a space-saving SFX-L form-factor. Micro-fit PSU connectors and fully modular, flexible cables enable a tidy and compact build, even for exceedingly powerful systems. A 120mm rifle bearing PWM fan deploys Zero RPM mode at lower loads for exceptionally quiet performance. Japanese 105°C-rated electrolytic capacitors deliver long life and reliability, backed by a seven-year warranty. Wake your computer faster and consume less power with Modern Standby sleep mode. For high-wattage, 80 PLUS Gold power in a compact profile, the SF-L Series is your small form X-factor.
    See all Power Supplies
    See all Power Supplies
  9. CORSAIR - RM Series RM750 750W ATX 80 PLUS GOLD Certified Fully Modular Power Supply - White - Front_Zoom
    Top comment

    "Great looking power supply....Very sleek looking Power supply to go with white pc builds....The Best Desktop PC Power Supply...This is a great PC power supply for my Desktop PC from Best Buy in Greensboro, NC."

    See all customer reviews

    Product Description

    CORSAIR RM Series Fully Modular Ultra-Low Noise Power Supplies deliver consistent 80 PLUS Gold efficient power to your PC. With triple EPS12V cables and four PCIe 8-pin power connectors, RM PSUs have all the connections needed to power today’s most demanding PC upgrades. Industrial-grade, 105°C-rated capacitors deliver superb electrical performance and reliability, backed by a ten-year warranty. Wake your computer faster and consume less power with support for the Modern Standby sleep mode. Zero RPM fan mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you connect only the cables your system requires. RM PSUs are quiet, efficient, and dependable to power your high-performance PC for years to come.
    See all Power Supplies
    Top comment

    "Great looking power supply....Very sleek looking Power supply to go with white pc builds....The Best Desktop PC Power Supply...This is a great PC power supply for my Desktop PC from Best Buy in Greensboro, NC."

    See all customer reviews

    Product Description

    CORSAIR RM Series Fully Modular Ultra-Low Noise Power Supplies deliver consistent 80 PLUS Gold efficient power to your PC. With triple EPS12V cables and four PCIe 8-pin power connectors, RM PSUs have all the connections needed to power today’s most demanding PC upgrades. Industrial-grade, 105°C-rated capacitors deliver superb electrical performance and reliability, backed by a ten-year warranty. Wake your computer faster and consume less power with support for the Modern Standby sleep mode. Zero RPM fan mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you connect only the cables your system requires. RM PSUs are quiet, efficient, and dependable to power your high-performance PC for years to come.
    See all Power Supplies
    See all Power Supplies
  10. CORSAIR - HXi Series 1000W 80 Plus Platinum Fully-Modular Ultra-Low Noise ATX Power Supply - Black - Front_Zoom
    Top comment

    "Excellent psu. If powers my pc when I connect it to the wall and my computer....Power Supply...Considering it is usually bought to power high end PC it should come with the extra PCIe cables for the newer graphics cards."

    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

    "Excellent psu. If powers my pc when I connect it to the wall and my computer....Power Supply...Considering it is usually bought to power high end PC it should come with the extra PCIe cables for the newer graphics cards."

    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
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