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Power Supplies under $300

All Power Supplies

12 power supplies under $300 from SilverStone, ASUS, Corsair and more. Most cost $218 to $279, and half cost less than $253.

Top brands: SilverStone (4)

CorsairSpec score 9.1

1000 Watts, Platinum, ATX, Fully modular

+1000 watt output for high-power systems
+ATX 3.1 standard supports newer GPUs
+Fully modular cables for a tidy build
$231.99-20%List: $289.99
as of 11/04/2026 22:24 PST - Details
SilverStoneSpec score 8.2

850 Watts, Platinum, SFX, ATX 3.0

+Compact SFX form factor for small builds
+850W output for high-end systems
+Includes 16-pin GPU connector
$217.99-7%Was: $233.99
as of 11/04/2026 07:08 PST - Details
be quiet!Spec score 9.3

1500 Watts, Platinum, ATX, Fully modular

+1500W output for high-power systems
+Fully modular cabling reduces cable clutter
+Native 12V-2x6 cable for 16-pin GPUs
−Large 1500W capacity may exceed needs of typical builds
$279.89
as of 11/04/2026 21:57 PST - Details
ASUSSpec score 9.1

1000 Watts, Platinum, SFX, Fully modular

+1000W output in a compact SFX form factor
+Fully modular cabling
+ATX 3.1 with PCIe 5.1 support
−SFX-L size fits only compatible small-form-factor cases
$279.99
as of 11/04/2026 21:50 PST - Details
SilverStoneSpec score 9.1

1000 Watts, Platinum, Fully modular

+1000W output for demanding systems
+Fully modular cable design
+Ultra compact 140mm depth
$256.99
as of 11/04/2026 07:08 PST - Details
ASUSSpec score 9.1

1000 Watts, Platinum, ATX, Fully modular

+1000W output for high-wattage builds
+Fully modular cabling
+Includes a 12V-2x6 GPU cable
$259.99
as of 11/04/2026 21:50 PST - Details
SeasonicSpec score 9.1

1000 Watts, Platinum, ATX, Fully modular

+1000W output for high-end multi-GPU builds
+Fully modular cable design
+ATX 3.1 compatible
$269.99
as of 11/04/2026 07:07 PST - Details
SilverStoneSpec score 9.1

1000 Watts, Platinum, SFX, Fully modular

+1000W output for high-power graphics cards
+Fully modular cabling reduces cable clutter
+SFX-L form factor for compact builds
$288.54
as of 11/04/2026 07:08 PST - Details
Cooler MasterSpec score 9.2

1300 Watts, Platinum, ATX, Fully modular

+1300W output for high-power builds
+Fully modular cabling reduces cable clutter
+16-pin GPU connector support
$249.99
as of 11/04/2026 22:23 PST - Details
FSPSpec score 8.3

1200 Watts, Platinum, ATX

+1200W output for high-load workstation builds
+80 PLUS Platinum efficiency certification
+Standard ATX form factor
$209.99
as of 11/04/2026 14:11 PST - Details
CorsairSpec score 9.1

1000 Watts, Platinum, SFX, Fully modular

+1000W output for high-wattage builds
+Fully modular cable design
+Compact SFX form factor for small cases
$228.17
as of 11/04/2026 22:25 PST - Details
SilverStoneSpec score 9.1

1000 Watts, Platinum, ATX, Fully modular

+1000W output for demanding systems
+Fully modular cable design
+Includes 16-pin GPU connector
$221.40
as of 11/04/2026 07:08 PST - Details

Compare specs

power supplyWattsEfficiencyFormModularATX versionSpec scorePrice
1000PlatinumATXFully modularATX 3.19.1$231.99
as of 11/04/2026 22:24 PST - Details
850PlatinumSFXATX 3.08.2$217.99
as of 11/04/2026 07:08 PST - Details
1500PlatinumATXFully modularATX 3.19.3$279.89
as of 11/04/2026 21:57 PST - Details
1000PlatinumSFXFully modularATX 3.19.1$279.99
as of 11/04/2026 21:50 PST - Details
1000PlatinumFully modular9.1$256.99
as of 11/04/2026 07:08 PST - Details
1000PlatinumATXFully modularATX 3.19.1$259.99
as of 11/04/2026 21:50 PST - Details
1000PlatinumATXFully modularATX 3.19.1$269.99
as of 11/04/2026 07:07 PST - Details
1000PlatinumSFXFully modular9.1$288.54
as of 11/04/2026 07:08 PST - Details
1300PlatinumATXFully modularATX 3.19.2$249.99
as of 11/04/2026 22:23 PST - Details
1200PlatinumATX8.3$209.99
as of 11/04/2026 14:11 PST - Details

Before you buy

Spec scores, pros and cons, and prices are explained in the How it works section of the About page.