Power Supplies under $100

5 power supplies under $100 from Rosewill, Thermaltake, MSI and more. Most cost $73 to $99, and half cost less than $80.

be quiet!Spec score 9.3

750 Watts, Platinum, ATX, Fully modular

+Platinum: the highest efficiency of the 26 here

+Fully modular: only 13 of 32 here have one

$99.90-38%List: ~~$159.90~~

as of 11/04/2026 13:06 PST - Details

ThermaltakeSpec score 8.3

750 Watts, Gold, ATX, ATX 3.1

+Gold: only 2 of 26 here have a higher efficiency

+750 watts: 17 of the 31 here have fewer watts

$74.99-25%List: ~~$99.99~~

as of 11/04/2026 08:06 PST - Details

MSISpec score 9.1

750 Watts, Gold, ATX, Fully modular

+750W output suits mid-range to high-end builds

+Fully modular cabling reduces loose cables

+16-pin GPU connector included

$89.99-18%List: ~~$109.99~~

as of 11/04/2026 00:18 PST - Details

MontechSpec score 9.1

750 Watts, Gold, ATX, Fully modular

+Gold: only 2 of 26 here have a higher efficiency

+Fully modular: only 13 of 32 here have one

$72.90-9%List: ~~$79.90~~

as of 11/04/2026 00:16 PST - Details

GamemaxSpec score 9.1

750 Watts, Gold, ATX, Fully modular

+750W output suits high-performance mid-range builds

+Fully modular cables reduce clutter inside the case

+Includes a 16-pin GPU connector

$79.99

as of 11/04/2026 15:06 PST - Details

Compare specs

Watts	Efficiency	Form	Modular	ATX version	Spec score	Price
750	Platinum	ATX	Fully modular	ATX 3.1	9.3	$99.90 as of 11/04/2026 13:06 PST - Details
750	Gold	ATX		ATX 3.1	8.3	$74.99 as of 11/04/2026 08:06 PST - Details
750	Gold	ATX	Fully modular	ATX 3.1	9.1	$89.99 as of 11/04/2026 00:18 PST - Details
750	Gold	ATX	Fully modular	ATX 3.1	9.1	$72.90 as of 11/04/2026 00:16 PST - Details
750	Gold	ATX	Fully modular	ATX 3.0	9.1	$79.99 as of 11/04/2026 15:06 PST - Details

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