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Best Buy customers often prefer the following products when searching for smallest atx power supply.

The smallest ATX power supply unit is a great choice for those who want to save space and still get the power they need. These units are also good for people who want to build their own rig and have a limited amount of space to work with. Browse the top-ranked list of some of the smallest ATX power supply units below along with associated reviews and opinions.

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  1. CORSAIR - CX-M Series CX650M Semi-Modular Low-Noise ATX Power Supply - Black - Front_Zoom
    Top comment

    "great value power supply, fan is pretty good no coil whine, comes with plenty of sata power cables, my one complaint is that only the CPU and 24 pin ATX cables are sleeved, all the modular cables are not sleeved, other then that awesome power supply for 50$...Reasonable price and very versatile power supply for my ATX motherboard...great value power supply...Replacement power suppy"

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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 value power supply, fan is pretty good no coil whine, comes with plenty of sata power cables, my one complaint is that only the CPU and 24 pin ATX cables are sleeved, all the modular cables are not sleeved, other then that awesome power supply for 50$...Reasonable price and very versatile power supply for my ATX motherboard...great value power supply...Replacement power suppy"

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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 $79.99
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  2. CORSAIR - CX-M Series CX750M Semi-Modular Low-Noise ATX Power Supply - Black - Front_Zoom
    Top comment

    "Good power supply...CORSAIR - CX-M Series CX750M Semi-Modular Low-Noise ATX Power Supply - Black is a really good power supply for mid end pc...Corsiar CX-M CX 750 ATX Power Supply...Great Power Supply- Easy to install and very low fan noise"

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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

    "Good power supply...CORSAIR - CX-M Series CX750M Semi-Modular Low-Noise ATX Power Supply - Black is a really good power supply for mid end pc...Corsiar CX-M CX 750 ATX Power Supply...Great Power Supply- Easy to install and very low fan noise"

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

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

    "Thermaltake - SMART 700W ATX 80 Plus Power Supply...Thermaltake - SMART 700W ATX 80 Plus Power Supply - Black is a highly suggested added feature for gamers...Easy to use! Small compact design fit great in my custom build gaming pc!"

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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

    "Thermaltake - SMART 700W ATX 80 Plus Power Supply...Thermaltake - SMART 700W ATX 80 Plus Power Supply - Black is a highly suggested added feature for gamers...Easy to use! Small compact design fit great in my custom build gaming pc!"

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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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    Your price for this item is $59.99
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  4. EVGA - 850W Modular BQ Power Supply - Black - Front_Zoom

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

    "ATX power supply...Power Supply...Easy to install, is Modular minus the Motherboard and CPU power lines."

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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

    "ATX power supply...Power Supply...Easy to install, is Modular minus the Motherboard and CPU power lines."

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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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  5. MSI - MPG A850G PCIE 5 850 Watt ATX 80 Plus Gold PSU Power Supply - Black - Front_Zoom
    Top comment

    "Great PCIe 5.0 and atx 3.0 PSU...Was hesitant at first to get and Msi brand power supply but I took a chance and it is very nice. "

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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 PCIe 5.0 and atx 3.0 PSU...Was hesitant at first to get and Msi brand power supply but I took a chance and it is very nice. "

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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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    Your price for this item is $144.99
    The previous price was $159.99
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  6. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black - Front_Zoom
    Top comment

    "Solid ATX Power Supply...This ATX Power Supply was procured to replace the old one in my desktop that failed to start the motherboard boot process. ...Good power supply...This 850 has the extra power supply to the ATX for the GPU and other peripherals. "

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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

    "Solid ATX Power Supply...This ATX Power Supply was procured to replace the old one in my desktop that failed to start the motherboard boot process. ...Good power supply...This 850 has the extra power supply to the ATX for the GPU and other peripherals. "

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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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    Your price for this item is $149.99
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  7. EVGA - GP Series SuperNOVA 1000W ATX 80 Plus Gold Fully Modular Power Supply - Black - Front_Zoom
    Top comment

    "EVGA 1000w ATX/EPS 80 Plus Gold Power Supply...Great power supply, has modular plugs for all the attachments. ...Great value power supply!...Been loving this PSU, more ATX ports than the similar Corsair RM1000x and a great warranty. more than enough for my 3090!"

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    Product Description

    The EVGA SuperNOVA G+ Power Supplies have arrived. Launched in 2013, the EVGA SuperNOVA G1 power supplies have been among the longest-lasting and best-performing power supplies on the market. Despite only a few changes over the years, it's only fitting that these are due for an upgrade. Enter the G+, the new and improved fully-modular power supply line-up from EVGA with an 80+ Gold Efficiency rating. Compared to the EVGA SuperNOVA G1 power supplies, the G+ are up to 20mm shorter, feature 100% Japanese capacitors, are up to 20% quieter, have much tighter 12v. load regulation, and have a superior fluid-dynamic bearing fan. Combining a full set of current, voltage, and temperature protections with EVGA's World Leading 10-Year Warranty, the EVGA SuperNOVA G+ power supplies set the new Gold standard for performance and value.
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    Top comment

    "EVGA 1000w ATX/EPS 80 Plus Gold Power Supply...Great power supply, has modular plugs for all the attachments. ...Great value power supply!...Been loving this PSU, more ATX ports than the similar Corsair RM1000x and a great warranty. more than enough for my 3090!"

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    Product Description

    The EVGA SuperNOVA G+ Power Supplies have arrived. Launched in 2013, the EVGA SuperNOVA G1 power supplies have been among the longest-lasting and best-performing power supplies on the market. Despite only a few changes over the years, it's only fitting that these are due for an upgrade. Enter the G+, the new and improved fully-modular power supply line-up from EVGA with an 80+ Gold Efficiency rating. Compared to the EVGA SuperNOVA G1 power supplies, the G+ are up to 20mm shorter, feature 100% Japanese capacitors, are up to 20% quieter, have much tighter 12v. load regulation, and have a superior fluid-dynamic bearing fan. Combining a full set of current, voltage, and temperature protections with EVGA's World Leading 10-Year Warranty, the EVGA SuperNOVA G+ power supplies set the new Gold standard for performance and value.
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    Your price for this item is $197.99
    Clearance
    The regular price is $219.99
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  8. Thermaltake - ToughPower Grand RGB 850W ATX12V 2.4/EPS12V 2.92 80 Plus Gold Modular Power Supply - Black - Front_Zoom
    Top comment

    "power...the thermalake - tough power grand rgb 850w atx 12v...Great power supply...Súper and beautiful thermaltake power supply. I highly recommend this product"

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    Product Description

    Run your custom desktop with this 80 PLUS Gold-rated Thermaltake Toughpower Grand power supply. Its fully modular design enables a flexible, space-efficient cabling setup, and its customizable RGB LED ring makes it visually distinct. The hydraulic bearing fan of this 850W Thermaltake Toughpower Grand power supply has an anti-vibration mounting system for quiet operation.
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    Top comment

    "power...the thermalake - tough power grand rgb 850w atx 12v...Great power supply...Súper and beautiful thermaltake power supply. I highly recommend this product"

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    Product Description

    Run your custom desktop with this 80 PLUS Gold-rated Thermaltake Toughpower Grand power supply. Its fully modular design enables a flexible, space-efficient cabling setup, and its customizable RGB LED ring makes it visually distinct. The hydraulic bearing fan of this 850W Thermaltake Toughpower Grand power supply has an anti-vibration mounting system for quiet operation.
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    Your price for this item is $99.99
    The previous price was $149.99
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  9. MSI - MPG A1000G PCIE 5 1000 Watt ATX 90 Plus Gold PSU Power Supply - Black - Front_Zoom
    Top comment

    "Excellent ATX 3.0 power supply...Excellent power supply. Comes with plenty of cables, enough for modern motherboards and graphics cards. ...Good ATX 3.0 psu...Amazing power supply wish all the cables were sleeved for the price. "

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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 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.
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    Top comment

    "Excellent ATX 3.0 power supply...Excellent power supply. Comes with plenty of cables, enough for modern motherboards and graphics cards. ...Good ATX 3.0 psu...Amazing power supply wish all the cables were sleeved for the price. "

    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.
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    Your price for this item is $199.99
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  10. CORSAIR - RMx Series RM1000x 80 PLUS Gold Fully Modular ATX Power Supply - Black - Front_Zoom
    Top comment

    "Power to the poeple!...It's also much larger than a standard ATX power supply, make sure you have room in your case for it. ...This power supply is a bit longer than a standard ATX power supply but offers Lots of power for use with multiple and/or high end graphics cards. "

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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.
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    Top comment

    "Power to the poeple!...It's also much larger than a standard ATX power supply, make sure you have room in your case for it. ...This power supply is a bit longer than a standard ATX power supply but offers Lots of power for use with multiple and/or high end graphics cards. "

    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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    Your price for this item is $189.99
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