Power Supplies under $400

3 power supplies under $400. Prices run $300 to $399.

CorsairSpec score 9.2

1000 Watts, Platinum, ATX, Fully modular

+1000 watt output for high-power systems

+ATX 3.1 standard supports newer GPUs

+16-pin GPU connector for modern graphics cards

$339.00

as of 11/04/2026 13:10 PST - Details

EVGASpec score 9.2

1000 Watts, Platinum, Fully modular

+1000 watts for high-power systems

+Fully modular cabling for cleaner builds

+Includes ECO Mode for quieter low-load operation

$399.99

as of 11/04/2026 14:09 PST - Details

XPGSpec score 8.2

1000 Watts, Gold, ATX 3.0

+1000W output for high-performance builds

+80 PLUS Gold efficiency certification

+ATX 3.0 standard compatibility

$300.27

as of 11/04/2026 00:46 PST - Details

Compare specs

Watts	Efficiency	Form	Modular	ATX version	Spec score	Price
1000	Platinum	ATX	Fully modular	ATX 3.1	9.2	$339.00 as of 11/04/2026 13:10 PST - Details
1000	Platinum		Fully modular		9.2	$399.99 as of 11/04/2026 14:09 PST - Details
1000	Gold			ATX 3.0	8.2	$300.27 as of 11/04/2026 00:46 PST - Details

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