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Power Supplies under $300

All Power Supplies

5 power supplies under $300 from SilverStone, ASUS, Corsair and more. Most cost $215 to $288, and half cost less than $228.

All filtersFilters (1)×
Form: SFX  ×Clear all
BrandSilverStone2ASUS1Corsair1Seasonic1
Watts1000375018501
EfficiencyPlatinum4Gold1
FormATX11SFX5
ModularFully modular4
ATX versionATX 3.12ATX 3.01
12V-2x6 GPU power12V-2x6 GPU power2
PriceUnder $2503$250 & above2
Clear allShow 5 Power Supplies
Form: SFX  ×5 resultsSort byRecommendedSpec scorePrice: low to highPrice: high to low
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
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, 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
SeasonicSpec score 8.8

750 Watts, Gold, SFX, Fully modular

+750W output in a compact SFX form factor
+Fully modular cable design
+Fits small form factor builds
$215.00
as of 11/04/2026 07:07 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

Compare specs

power supplyWattsEfficiencyFormModularATX versionSpec scorePrice
850PlatinumSFXATX 3.08.2$217.99
as of 11/04/2026 07:08 PST - Details
1000PlatinumSFXFully modularATX 3.19.1$279.99
as of 11/04/2026 21:50 PST - Details
1000PlatinumSFXFully modular9.1$288.54
as of 11/04/2026 07:08 PST - Details
750GoldSFXFully modular8.8$215.00
as of 11/04/2026 07:07 PST - Details
1000PlatinumSFXFully modularATX 3.19.1$228.17
as of 11/04/2026 22:25 PST - Details

Before you buy

Other price ranges

PC Cases264CPU Coolers393Processors247Data Center GPUs82Graphics Cards371Motherboards640Memory374Storage Drives577Binoculars228Network Cables1,382Cameras2,556Chromebooks196

Popular filters

Fully Modular Power Supplies97ATX Power Supplies95ATX 3.1 Power Supplies88Power Supplies with 12V-2x6 GPU Power8580 Plus Gold Power Supplies76Power Supplies under $15067Power Supplies under $200641000W Power Supplies61

Power Supplies by use

Power Supply for a Gaming PC121

Related product types

Power Supplies under $15067Power Supplies under $20064Power Supplies under $25036Power Supplies under $10031Power Supplies under $7518Power Supplies under $5010

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