Power Supplies under $300

2 power supplies under $300 from SilverStone, ASUS, Corsair and more. Prices run $218 to $289.

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

EVGASpec score 8.0

850 Watts, Gold, Semi-modular

+Delivers 850 watts for high-power builds

+Semi-modular design keeps some cables permanently attached

+Includes EVGA ECO Mode

−Semi-modular design offers fewer cable removal options than fully modular units

$289.29

as of 11/04/2026 22:50 PST - Details

Compare specs

power supply	Watts	Efficiency	Form	Modular	ATX version	Spec score	Price
	850	Platinum	SFX		ATX 3.0	8.2	$217.99 as of 11/04/2026 07:08 PST - Details
	850	Gold		Semi-modular		8.0	$289.29 as of 11/04/2026 22:50 PST - Details

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