Best Power Supplies Under £100 (2026)
60 active power supplies priced at or below £100 · sorted by editor rating then price · prices update hourly
About this price band
The £100 cap is where most UK buyers in the power supplies market actually shop. We only feature products with a live, primary affiliate offer, so every entry can actually be bought today. Prices are pulled from Amazon UK and refreshed on a regular schedule, so what you see here is what you will pay on the merchant page when you click through.
Every power supply we list under £100
EnhanBili Best Price Mean Well LRS-350-12 350W 12V 30A Switching Power Supply
4.8/5£30.66
MSI MAG A550BN Power Supply, EU Plug - 550 W, 80 Plus Bronze Certified, ATX Power Supply, 12 V Single Rail, DC/DC Voltage Converter Design, 120 mm Fan
4.8/5£44.97
GIGABYTE UD850GM PG5 V2 ICE Power Supply Unit- PCIe Gen 5.1, 80 PLUS Gold, Fully Modular Design, 120mm Fan, ATX 3.1 compatible, UK Plug
4.8/5£100
TUF Gaming 850W Gold (850 Watt, ATX 3.0 Compatible, Fully Modular Power Supply, 80+ Gold, Military-grade Components, Dual Ball Bearing, Axial-tech Fan, PCB Coating, 10 Year Warranty)
4.7/5£86.06
Seasonic Core GX ATX 3 2024 650W Fully Modular 80+ Gold PCIE 5.1 Power Supply/PSU ATX3.1
4.7/5£88.94
Corsair RM850x 80 PLUS Gold Fully Modular ATX 850 Watt Power Supply (135 Mm Magnetic Levitation Fan, Wide Compatibility, Reliabile Japanese Capacitors, Extremely Fast Wake-from-Sleep) UK - Black
4.7/5£92.16
CORSAIR CX550 80 PLUS Bronze Non Modular Low-Noise ATX 550 Watt Power Supply - UK - Black
4.6/5£47.99
GIGABYTE UD850GM Power Supply Unit - 850W, 80 PLUS Gold Certified, Fully Modular, Japanese Capacitors, UK plug
4.6/5£67.30
THERMALTAKE Toughpower GT 750W | ATX 3.1 | Modular Power Supply | 80Plus Gold
4.6/5£84.98
CORSAIR RM750e (2025) Fully Modular Low-Noise ATX Power Supply with 12V-2x6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – White
4.6/5£89.99
CORSAIR RM850e (2025) Fully Modular Low-Noise ATX Power Supply with 12V-2x6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black
4.6/5£90.99
NZXT C750 Bronze ATX 3.1 - Non-Modular Power Supply - 750 Watts - 12V-2x6 Connector - 120mm FDB Fan - Compact 140mm Size - Black
4.5/5£54.90
Mars Gaming MPB750S, ATX ARGB Power Supply 750W, 6 Years Warranty, 80Plus Bronze 230V EU, 90% Efficiency, 120mm AI-RPM Fan, ARGB MB Control Lighting, DC-DC and SMD Technologies, Black
4.5/5£57.19
SilverStone SST-ST45SF v 3.0 - SFX Series, 450W 80 Plus Bronze PC Power Supply, Low Noise 92mm
4.5/5£69.98
Itek Power Supply for PC GF750 EVO - 750W HDB Hydraulic Dynamic Bearing 12mm Active PFC Protection Efficiency Certification 80 Plus Gold Semi Modular Plug Giapp Capacitors
4.5/5£80.74
GIGABYTE P650G PCIE 5.1 Power Supply - PCIe 5.1, 80 Plus Silver, 120mm Fan, ATX 3.1 Compliant, EU Plug
4.5/5£86.66
Asus Prime 750W Gold Gaming PSU, Double Ball Bearing Fan, Fully Modular, 80+ Gold, ATX 3.0, PCIe 5.0
4.5/5£97.99
Thermaltake Smart BM3 850W/ 80Plus Bronze/ATX 3.0 & PCIE 5.0 Ready/Semi-Modular Power Supply/ 105°C/221°F Japanese Capacitor/ 5 Year Warranty
4.5/5£99.99
Tacens Anima APIII850, ATX 850W Power Supply, SMD and DC-DC Technologies, 85% 12V Efficiency, Ultra-Quiet 12cm Fan, 105º Japanese Capacitors, Carbon Fiber Cables, Black
4.4/5£40.64
Tecnoware Power Systems - ATX Hyper Stream Bronze 500W PSU for PC | Silent 4.7in Fan | Optimized Wiring | Multiple Connectors: 20+4, 12V 4+4, 6+2 PCI-E, Molex, Sata | 500W NVIDIA
4.4/5£46.68
Mars Gaming MPIII650, PC ATX 650W Power Supply, 5 Years Warranty, 85% Efficiency, Digital APFC System, 120mm AI-RPM FDB Fan, DC-DC and SMD Technologies, Extra-Long Flat Cables, White
4.4/5£49.19
Aerocool LUXPRO650, Power Supply 650W, 80Plus Bronze 230V EU Certified, Efficiency +88%, Japanese Capacitors 105°C, FDB 14cm Fan with APFC Technology, 5 Years Warranty, Black
4.4/5£57.19
Gigabyte UD750GM PG5 80 Plus Gold Fully Modular 750w PCIe 5.0 Power Supply Unit, ATX 3.0, 12VHPWR GPU Connector, Flat Cables, 5 Year Warranty
4.3/5£79.99
ENDORFY Supremo FM5 Gold 750 W unité d'alimentation d'énergie 18+10 pin ATX ATX Noir
4.3/5£86.44