Best Buy Tech Fest SaleEnds Sunday. Limited quantities. No rainchecks.Shop now

Skip to contentGo to Product Search
Main Content
Skip to contentGo to Product Search

Best Buy Tech Fest SaleEnds Sunday. Limited quantities. No rainchecks.Shop now

Main Content
Categories & Filters
Best Buy

/

computer cards & components

/

power supplies

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.

Read More
Results
Main Results

  1. Thermaltake - Toughpower SFX 850W 80Plus Platinum ATX 3.1 Standard Power Supply - Black

    SKU: J39ZPC9VTH

    Product Description

    A fully modular black power supply featuring 80 PLUS Platinum efficiency and ATX 3.1 compatibility.
    See all Power Supplies
    Your price for this item is $129.99
    Save $50
    The previous price was $179.99

  2. Thermaltake - Toughpower SFX 750W 80Plus Platinum ATX 3.1 Standard Power Supply - Black

    SKU: J39ZPC9V6V

    Product Description

    A fully modular black power supply featuring 80 PLUS Platinum efficiency and ATX 3.1 compatibility.
    See all Power Supplies
    Your price for this item is $139.99
    Save $30
    The previous price was $169.99

  3. CORSAIR - CX-M Series CX650M Semi-Modular Low-Noise ATX Power Supply - Black

    SKU: J39QHHFSS2

    Product Description

    A black semi-modular ATX power supply offering low-noise operation, 80 PLUS Bronze efficiency, and reliable performance.
    See all Power Supplies
    Your price for this item is $89.74

  4. CORSAIR - RMX Series RM1000x Cybenetics Gold Fully Modular ATX Power Supply - Black

    SKU: J39QHTJWGF

    Product Description

    A fully modular black ATX power supply offering Cybenetics Gold efficiency and ultra-quiet 140mm fan.
    See all Power Supplies
    Your price for this item is $179.99
    Save $30
    The previous price was $209.99

  5. CORSAIR - RMe Series RM850e 80 PLUS Gold Fully Modular Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - White

    SKU: J39QHTCVPR

    Works great and is able to power my pc without any issues....Amazing Power Supply

    Product Description

    A fully modular white power supply offering low-noise operation, 80 PLUS Gold efficiency, and ATX 3.1 compatibility.
    See all Power Supplies
    Your price for this item is $134.99
    Save $20
    The previous price was $154.99

  6. CORSAIR - RMe Series RM750e 80 PLUS Gold Fully Modular Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - Black

    SKU: J39QHT23ZX

    Ultra Quiet Power Supply!...The price at the time of purchase (early 2025) is great compared to other similar power supplies....Great and easy to use power supply. I love Corsair and their power supplies...

    Product Description

    A fully modular black power supply offering low-noise operation, 80 PLUS Gold efficiency, and ATX 3.1 compatibility.
    See all Power Supplies
    Your price for this item is $114.99

  7. CORSAIR - RMe Series RM750e 80 PLUS Gold Fully Modular Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - White

    SKU: J39QHTCVCY

    Love love love, it’s pretty and white and the power is unmatched...Fixed my Power Issues

    Product Description

    A fully modular, low-noise white power supply with Cybenetics Gold efficiency and ATX 3.1 compliance.
    See all Power Supplies
    Your price for this item is $109.99
    Save $15
    The previous price was $124.99

  8. CORSAIR - RMe Series RM1000e 80 PLUS Gold Fully Modular Low-Noise ATX 3.1 and PCIE 5.1 Power Supply - Black

    SKU: J39QHT28XQ

    Product Description

    A fully modular black power supply offering low-noise operation, Cybenetics Gold efficiency, and ATX 3.1 compatibility.
    See all Power Supplies
    Your price for this item is $164.99
    Save $25
    The previous price was $189.99

  9. CORSAIR - CX-M Series CX650M Semi-Modular Low-Noise ATX 3.1 Power Supply - Black

    SKU: J39TSCHZ22

    Product Description

    A semi-modular black ATX power supply with low-noise operation, Cybenetics Bronze efficiency, and PCIe 5.1 support.
    See all Power Supplies
    Your price for this item is $89.99
1-18 of 176 items
0 items

Best Sellers

Related Pages

Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada

In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.