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Power Supplies under $100

All Power Supplies

31 power supplies under $100 from Rosewill, Thermaltake, MSI and more. Most cost $40 to $94, and half cost less than $75.

Top brands: MSI (5)

All filtersFilters (1)×
Price: Under $100  ×Clear all
BrandRosewill6MSI5Thermaltake3be quiet!2Esgaming2SilverStone2ASRock1Corsair1
Show all 17Enermax1Evounic1Gamemax1GIGABYTE1LAP Lambert Academic Publishing1Montech1Phanteks1Raijintek1XPG1
Watts65098507750550031000222013001450155016001
EfficiencyGold17Bronze7Platinum2
FormATX23SFX2
ModularFully modular13Non-modular9Semi-modular2
ATX versionATX 3.115ATX 3.02
12V-2x6 GPU power12V-2x6 GPU power15
PriceUnder $5010Under $7517Under $10031Under $15022Under $2001$50 & above22$75 & above15
Clear allShow 31 Power Supplies
Price: Under $100  ×31 resultsSort byRecommendedSpec scorePrice: low to highPrice: high to low
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
be quiet!Spec score 8.3

850 Watts, Gold, ATX, ATX 3.1

+850 watts: only 2 of 31 here have more watts
+Gold: only 2 of 26 here have a higher efficiency
$89.90
as of 11/04/2026 13:06 PST - Details

Compare specs

power supplyWattsEfficiencyFormModularATX versionSpec scorePrice
500Fully modular8.9$49.99
as of 11/04/2026 07:06 PST - Details
850GoldATXATX 3.18.3$89.90
as of 11/04/2026 13:06 PST - Details
n/a$88.27
as of 11/04/2026 00:03 PST - Details

Before you buy

Other price ranges

PC Cases264CPU Coolers393Processors247Data Center GPUs82Graphics Cards371Motherboards640Memory374Storage Drives577Binoculars228Network Cables1,382Cameras2,556Chromebooks196

Popular filters

Fully Modular Power Supplies97ATX Power Supplies95ATX 3.1 Power Supplies88Power Supplies with 12V-2x6 GPU Power8580 Plus Gold Power Supplies76Power Supplies under $15068Power Supplies under $200641000W Power Supplies61

Power Supplies by use

Power Supply for a Gaming PC121

Related product types

Power Supplies under $15068Power Supplies under $20064Power Supplies under $25037Power Supplies under $30021Power Supplies under $7519Power Supplies under $5010Power Supplies under $4007

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