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Power Supplies under $100

All Power Supplies

9 power supplies under $100 from Rosewill, Thermaltake, MSI and more. Most cost $36 to $61, and half cost less than $48.

MSISpec score 8.2

650 Watts, Gold, ATX, Non-modular

+650W output in a standard ATX form factor
+80 PLUS Gold efficiency certification
+Low noise operation
−Non-modular design means cables cannot be removed
$42.74-39%List: $69.99
as of 11/04/2026 00:18 PST - Details
Rosewill

550 Watts, Non-modular

+550W output for mid-range builds
+Active PFC design for power factor correction
+Low-noise design for quieter operation
−Non-modular design means all cables are fixed
$35.98-22%List: $45.99
as of 11/04/2026 07:06 PST - Details
ThermaltakeSpec score 8.1

600 Watts, Gold, ATX, Non-modular

+600W continuous output in a standard ATX form factor
+Supports SLI and Crossfire configurations
+Built to ATX 12V V2.4 and EPS V2.92 standards
−Non-modular design means all cables are permanently attached
$59.99-14%List: $69.99
as of 11/04/2026 08:06 PST - Details
MSISpec score 7.8

650 Watts, Bronze, Non-modular

+650W output suits mid-range gaming builds
+Compact design fits smaller cases
+Low-noise fan for quieter operation
−Non-modular design means all cables stay attached
$61.99-5%List: $64.99
as of 11/04/2026 00:18 PST - Details
RosewillSpec score 8.2

650 Watts, Gold, ATX, Non-modular

+650W output for mid-range builds
+ATX 3.1 compatible for current PC standards
+Includes a 16-pin PCIe 5.1 GPU connector
−Non-modular design means all cables are fixed
$47.97-20%List: $59.99
as of 11/04/2026 07:06 PST - Details
RaijintekSpec score 8.3

850 Watts, Gold, ATX, Non-modular

+850W output for mid-to-high power builds
+ATX 3.1 standard with PCIe 5.1 support
+16-pin connector for modern graphics cards
−Non-modular cabling leaves all cables permanently attached
$79.99
as of 11/04/2026 00:48 PST - Details
EvounicSpec score 7.8

650 Watts, Bronze, ATX, Non-modular

+650W output in a standard ATX form factor
+80 PLUS Bronze efficiency certification
+Non-modular design with fixed cables
−Non-modular design means cables cannot be removed
$39.96
as of 11/04/2026 14:09 PST - Details
Esgaming

650 Watts, ATX, Non-modular

+650 watts for mid-range builds
+Includes 120mm fan for cooling
+Switchable 115/230 voltage input
−Non-modular cabling leaves unused cables inside the case
$34.96
as of 11/04/2026 14:09 PST - Details
MSISpec score 8.2

650 Watts, Gold, ATX, Non-modular

+650W output suits mid-range builds
+ATX 3.1 standard for current PC builds
+Active PFC listed
−Non-modular cabling leaves all cables permanently attached
$59.99
as of 11/04/2026 00:18 PST - Details

Compare specs

power supplyWattsEfficiencyFormModularATX versionSpec scorePrice
650GoldATXNon-modular8.2$42.74
as of 11/04/2026 00:18 PST - Details
550Non-modularn/a$35.98
as of 11/04/2026 07:06 PST - Details
600GoldATXNon-modular8.1$59.99
as of 11/04/2026 08:06 PST - Details
650BronzeNon-modular7.8$61.99
as of 11/04/2026 00:18 PST - Details
650GoldATXNon-modularATX 3.18.2$47.97
as of 11/04/2026 07:06 PST - Details
850GoldATXNon-modularATX 3.18.3$79.99
as of 11/04/2026 00:48 PST - Details
650BronzeATXNon-modular7.8$39.96
as of 11/04/2026 14:09 PST - Details
650ATXNon-modularn/a$34.96
as of 11/04/2026 14:09 PST - Details
650GoldATXNon-modularATX 3.18.2$59.99
as of 11/04/2026 00:18 PST - Details

Before you buy

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