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Power Supplies under $100

All Power Supplies

12 power supplies under $100 from Rosewill, Thermaltake, MSI and more. Most cost $50 to $98, and half cost less than $90.

PhanteksSpec score 9.5

1000 Watts, Platinum, ATX, Fully modular

+1000W output for high-power gaming systems
+Fully modular cable-less design
+16-pin GPU connector for newer graphics cards
$69.08-65%List: $199.99
as of 11/04/2026 00:38 PST - Details
be quiet!Spec score 9.3

750 Watts, Platinum, ATX, Fully modular

+Platinum: the highest efficiency of the 25 here
+Fully modular: only 12 of 31 here have one
$99.90-38%List: $159.90
as of 11/04/2026 13:06 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
RosewillSpec score 9.3

1000 Watts, Gold, ATX, Fully modular

+1000W output for high-end multi-GPU builds
+Fully modular cable design
+Includes 16-pin PCIe 5.1 12V-2x6 connector
$94.99-14%List: $109.99
as of 11/04/2026 07:06 PST - Details
MontechSpec score 9.1

750 Watts, Gold, ATX, Fully modular

+Gold: only 2 of 25 here have a higher efficiency
+Fully modular: only 12 of 31 here have one
$72.90-9%List: $79.90
as of 11/04/2026 00:16 PST - Details
XPGSpec score 9.2

850 Watts, Gold, Fully modular, ATX 3.1

+850W output for high-end graphics cards
+Fully modular cable design
+ATX 3.1 compatible design
$89.99-25%List: $119.99
as of 11/04/2026 09:06 PST - Details
EnermaxSpec score 9.2

850 Watts, Gold, ATX, Fully modular

+Fully modular cabling for cleaner builds
+Includes 16-pin GPU connector for modern graphics cards
+ATX 3.1 standard for current PC builds
$95.49
as of 11/04/2026 14:08 PST - Details
EsgamingSpec score 8.9

500 Watts, Gold, Fully modular

+Delivers 500 watts in an ITX, 1U and Flex ATX form factor
+Fully modular cables reduce clutter in small cases
+Supports 90-264V input range with APFC
$49.98
as of 11/04/2026 14:09 PST - Details
RosewillSpec score 8.9

500 Watts, Fully modular

+500W output for Mini ITX and Flex ATX builds
+Fully modular design reduces cable clutter
+1U form factor for compact systems
$49.99
as of 11/04/2026 07:06 PST - Details
GIGABYTESpec score 9.2

850 Watts, Gold, ATX, Fully modular

+Fully modular design reduces loose cables inside the case
+850W output for mid to high-end builds
+ATX form factor fits standard PC cases
$89.99
as of 11/04/2026 15:07 PST - Details
RosewillSpec score 9.2

850 Watts, Gold, ATX, Fully modular

+850W output for high-power gaming and workstation builds
+Fully modular cable design
+Includes 16-pin PCIe 5.0 12V-2x6 connector
$98.90
as of 11/04/2026 07:06 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

power supplyWattsEfficiencyFormModularATX versionSpec scorePrice
1000PlatinumATXFully modularATX 3.09.5$69.08
as of 11/04/2026 00:38 PST - Details
750PlatinumATXFully modularATX 3.19.3$99.90
as of 11/04/2026 13:06 PST - Details
750GoldATXFully modularATX 3.19.1$89.99
as of 11/04/2026 00:18 PST - Details
1000GoldATXFully modularATX 3.19.3$94.99
as of 11/04/2026 07:06 PST - Details
750GoldATXFully modularATX 3.19.1$72.90
as of 11/04/2026 00:16 PST - Details
850GoldFully modularATX 3.19.2$89.99
as of 11/04/2026 09:06 PST - Details
850GoldATXFully modularATX 3.19.2$95.49
as of 11/04/2026 14:08 PST - Details
500GoldFully modular8.9$49.98
as of 11/04/2026 14:09 PST - Details
500Fully modular8.9$49.99
as of 11/04/2026 07:06 PST - Details
850GoldATXFully modular9.2$89.99
as of 11/04/2026 15:07 PST - Details

Before you buy

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