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

A computer power supply unit is a component that converts AC power from your wall socket into the stable, consistent DC power that your computer's components need to work. If you're building a new computer or upgrading an old one, you'll want to make sure you get the right power supply unit for your needs. Browse the top-ranked list of small computer power supplies below along with associated reviews and opinions.

Main Results
  1. EVGA - GT Series 850W Auto Eco Mode with FDB Fan 80 Plus Power Supply - Front_Zoom
    Top comment

    "I got this for a replacement of an older 750. It powers my computer as it should. I see how it does after 6 months....great compact power supply that allows room for extra fan in bottom of case for 120cm fan...Solid Power Supply...small but powerfull"

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    Product Description

    Introducing the EVGA SuperNOVA GT Series of power supplies - the newest addition to the outstanding line of EVGA Power Supplies. Featuring 80 Plus Gold certification, 100% Japanese capacitors, a fluid dynamic bearing fan, and a fully modular design, this power supply is built for long-term usage and durability. Building upon EVGA's line of 80 Plus Gold rated power supplies, the EVGA GT Series combines all these features at a great price.
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    Top comment

    "I got this for a replacement of an older 750. It powers my computer as it should. I see how it does after 6 months....great compact power supply that allows room for extra fan in bottom of case for 120cm fan...Solid Power Supply...small but powerfull"

    See all customer reviews

    Product Description

    Introducing the EVGA SuperNOVA GT Series of power supplies - the newest addition to the outstanding line of EVGA Power Supplies. Featuring 80 Plus Gold certification, 100% Japanese capacitors, a fluid dynamic bearing fan, and a fully modular design, this power supply is built for long-term usage and durability. Building upon EVGA's line of 80 Plus Gold rated power supplies, the EVGA GT Series combines all these features at a great price.
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    Your price for this item is $159.99
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  2. CORSAIR - CX-M Series CX750M Semi-Modular Low-Noise ATX Power Supply - Black - Front_Zoom
    Top comment

    "affordable power supply...the power supply is very efficient at keeping my computers power good and helps it a lot...Quiet, convenient power....The semi-modular design makes installation simpler and helps prevent unnecessary clutter in the computer chassis. As advertised, the power supply is very quiet."

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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

    "affordable power supply...the power supply is very efficient at keeping my computers power good and helps it a lot...Quiet, convenient power....The semi-modular design makes installation simpler and helps prevent unnecessary clutter in the computer chassis. As advertised, the power supply is very quiet."

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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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    Your price for this item is $89.99
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  3. EVGA - 850W Modular BQ Power Supply - Black - Front_Zoom

    Model: 110-BQ-0850-V1
    SKU: 5594501
    Top comment

    "power supply for gaming computer...Upgraded gaming computers current power supply so that it had more power to run the higher games...works great...Solid power supply...EVGA makes well built power supplies. Never have had a problem with them in over 15 computer builds."

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    Product Description

    Power your customized desktop computer with this EVGA power supply. The large built-in fan prevents it from overheating during heavy use, and the sturdy box construction makes it easy to mount externally or install in your computer shell. This EVGA power supply comes with all the cords needed for installation.
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    Top comment

    "power supply for gaming computer...Upgraded gaming computers current power supply so that it had more power to run the higher games...works great...Solid power supply...EVGA makes well built power supplies. Never have had a problem with them in over 15 computer builds."

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    Product Description

    Power your customized desktop computer with this EVGA power supply. The large built-in fan prevents it from overheating during heavy use, and the sturdy box construction makes it easy to mount externally or install in your computer shell. This EVGA power supply comes with all the cords needed for installation.
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    Your price for this item is $119.99
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  4. 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....Updated computer graphics a needed new power supply. Fit in my compact computer housing and works good"

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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....Updated computer graphics a needed new power supply. Fit in my compact computer housing and works good"

    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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    Your price for this item is $59.99
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  5. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black - Front_Zoom
    Top comment

    "power supplying power supplies...i love it, it works perfectly fine. the power supply supplies power to the power supply that supplies power to the power supply nice...Supplies my computer with power, as intended. Supplies my computer with power, as intended Supplies my computer with power, as intended Supplies my computer with power, as intended Supplies my computer with power, as intended"

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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

    "power supplying power supplies...i love it, it works perfectly fine. the power supply supplies power to the power supply that supplies power to the power supply nice...Supplies my computer with power, as intended. Supplies my computer with power, as intended Supplies my computer with power, as intended Supplies my computer with power, as intended Supplies my computer with power, as intended"

    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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    Your price for this item is $149.99
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  6. EVGA - 650 BP, 80+ BRONZE 650W, 100-BP-0650-K1, Power supply - Front_Zoom
    Top comment

    "Small in size...Drive was a small size the your normal power supply...Great power supply at good price....and in stock...Power supply on my work computer blew so needed a replacement ASAP. "

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    Product Description

    Precision is power, as the EVGA BP power supplies add another affordable option to EVGA's 80PLUS Bronze-certified lineup, while reducing the overall length to 120mm - EVGA's shortest ATX power supply to-date! The BP power supplies feature a 115mm hydraulic bearing fan to ensure that staying cool and quiet is no tall order. Combining a full suite of protections and EVGA's 3 Year Limited Warranty, this power supply should be on the short list for your next system build.
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    Top comment

    "Small in size...Drive was a small size the your normal power supply...Great power supply at good price....and in stock...Power supply on my work computer blew so needed a replacement ASAP. "

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    Product Description

    Precision is power, as the EVGA BP power supplies add another affordable option to EVGA's 80PLUS Bronze-certified lineup, while reducing the overall length to 120mm - EVGA's shortest ATX power supply to-date! The BP power supplies feature a 115mm hydraulic bearing fan to ensure that staying cool and quiet is no tall order. Combining a full suite of protections and EVGA's 3 Year Limited Warranty, this power supply should be on the short list for your next system build.
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    Your price for this item is $74.99
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  7. EVGA SuperNOVA 1000 GT Fully Modular Power Supply - Front_Zoom

    Model: 220-GT-1000-X1
    SKU: 6528734
    Top comment

    "Does not work with AMD high power cable...This was a overall great power supply just didn't work with Corsair high power cable other than that supplies enough power to high-end graphics cards...It powers on...The braided cables are high quality. The power supply is supplying power"

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    Product Description

    Introducing the EVGA SuperNOVA GT Series of power supplies - the newest addition to the outstanding line of EVGA Power Supplies. Featuring 80 Plus Gold certification, 100% Japanese capacitors, a fluid dynamic bearing fan, and a fully modular design, this power supply is built for long-term usage and durability. Building upon EVGA's line of 80 Plus Gold rated power supplies, the EVGA GT Series combines all these features at a great price.
    See all Power Supplies
    Top comment

    "Does not work with AMD high power cable...This was a overall great power supply just didn't work with Corsair high power cable other than that supplies enough power to high-end graphics cards...It powers on...The braided cables are high quality. The power supply is supplying power"

    See all customer reviews

    Product Description

    Introducing the EVGA SuperNOVA GT Series of power supplies - the newest addition to the outstanding line of EVGA Power Supplies. Featuring 80 Plus Gold certification, 100% Japanese capacitors, a fluid dynamic bearing fan, and a fully modular design, this power supply is built for long-term usage and durability. Building upon EVGA's line of 80 Plus Gold rated power supplies, the EVGA GT Series combines all these features at a great price.
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    Your price for this item is $169.99
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  8. MSI - MPG A850G PCIE 5 850 Watt ATX 80 Plus Gold PSU Power Supply - Black - Front_Zoom
    Top comment

    "Great power supply...Excellent power supply for the rtx 4090 cards works very well and silent 100% recommended...I wanted a new power supply so i didnt have to use the 40 series gpu dongle and this works nicely"

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    Product Description

    The MPG gaming power supply is equipped to support the latest NVIDIA GeForce RTX 4000 Series and AMD GPUs. The efficiency of your power supply can make a world of a difference; it's why we offer a reliable 80+ Gold power proficiency PSU and a 10-year limited warranty guaranteeing a long term reliable solution for your gaming system. Organizing cables is often the most bothersome part of building a PC. With the MPG gaming power supply's fully modular design, we've given you the option of what cables you'll need for your system and defeat the clutter. With that in mind we've gone with a flat black design to further help you create the most beautiful cable managed pc system around. The remaining cables can be nicely stored away in the included cable bag. The MPG gaming power supply comes in 160mm and 150mm wide dimensions to ensure a comfortable fit in more pc chassis so it can continue to maintain a comfortable space for your cable management needs.
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    Top comment

    "Great power supply...Excellent power supply for the rtx 4090 cards works very well and silent 100% recommended...I wanted a new power supply so i didnt have to use the 40 series gpu dongle and this works nicely"

    See all customer reviews

    Product Description

    The MPG gaming power supply is equipped to support the latest NVIDIA GeForce RTX 4000 Series and AMD GPUs. The efficiency of your power supply can make a world of a difference; it's why we offer a reliable 80+ Gold power proficiency PSU and a 10-year limited warranty guaranteeing a long term reliable solution for your gaming system. Organizing cables is often the most bothersome part of building a PC. With the MPG gaming power supply's fully modular design, we've given you the option of what cables you'll need for your system and defeat the clutter. With that in mind we've gone with a flat black design to further help you create the most beautiful cable managed pc system around. The remaining cables can be nicely stored away in the included cable bag. The MPG gaming power supply comes in 160mm and 150mm wide dimensions to ensure a comfortable fit in more pc chassis so it can continue to maintain a comfortable space for your cable management needs.
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    Your price for this item is $159.99
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  9. MSI - MPG A1000G PCIE 5 1000 Watt ATX 90 Plus Gold PSU Power Supply - Black - Front_Zoom
    Top comment

    "MSI power supply...Msi power supply,perfect for RTX 40 series. The cable was supplied with this power supply....40xx gpu ready power supply pcie5...these ver 3 power supplies do not supply certain power that older boards need and can only be used on the latest and greatest motherboards."

    See all customer reviews

    Product Description

    The MPG gaming power supply is equipped to support the latest NVIDIA GeForce RTX 4000 Series and AMD GPUs. The efficiency of your power supply can make a world of a difference; it's why we offer a reliable 90+ Gold power proficiency PSU and a 10-year limited warranty guaranteeing a long term reliable solution for your gaming system. Organizing cables is often the most bothersome part of building a PC. With the MPG gaming power supply's fully modular design, we've given you the option of what cables you'll need for your system and defeat the clutter. With that in mind we've gone with a flat black design to further help you create the most beautiful cable managed pc system around. The remaining cables can be nicely stored away in the included cable bag. The MPG gaming power supply comes in 160mm and 150mm wide dimensions to ensure a comfortable fit in more pc chassis so it can continue to maintain a comfortable space for your cable management needs.
    See all Power Supplies
    Top comment

    "MSI power supply...Msi power supply,perfect for RTX 40 series. The cable was supplied with this power supply....40xx gpu ready power supply pcie5...these ver 3 power supplies do not supply certain power that older boards need and can only be used on the latest and greatest motherboards."

    See all customer reviews

    Product Description

    The MPG gaming power supply is equipped to support the latest NVIDIA GeForce RTX 4000 Series and AMD GPUs. The efficiency of your power supply can make a world of a difference; it's why we offer a reliable 90+ Gold power proficiency PSU and a 10-year limited warranty guaranteeing a long term reliable solution for your gaming system. Organizing cables is often the most bothersome part of building a PC. With the MPG gaming power supply's fully modular design, we've given you the option of what cables you'll need for your system and defeat the clutter. With that in mind we've gone with a flat black design to further help you create the most beautiful cable managed pc system around. The remaining cables can be nicely stored away in the included cable bag. The MPG gaming power supply comes in 160mm and 150mm wide dimensions to ensure a comfortable fit in more pc chassis so it can continue to maintain a comfortable space for your cable management needs.
    See all Power Supplies
    Your price for this item is $199.99
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  10. CORSAIR - CX-M Series CX650M Semi-Modular Low-Noise ATX Power Supply - Black - Front_Zoom
    Top comment

    "Nice power supply...So far so good great price and plenty of power for my computer. Quite . Nice warranty. Had a 550 watt power supply that died and replaced with this one . ...Computer Blues...There’s nothing worse than a non working computer! Best Buy had the power supply in stock which allowed us to get up and running."

    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.
    See all Power Supplies
    Top comment

    "Nice power supply...So far so good great price and plenty of power for my computer. Quite . Nice warranty. Had a 550 watt power supply that died and replaced with this one . ...Computer Blues...There’s nothing worse than a non working computer! Best Buy had the power supply in stock which allowed us to get up and running."

    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.
    See all Power Supplies
    Your price for this item is $79.99
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