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Best Power Supplies Under £100 (2026)

60 active power supplies priced at or below £100 · sorted by editor rating then price · prices update hourly

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

SkyRC eFuel Power Supply PSU 17A / 12V / 200W
5.0/5£58.95
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Mean Well SP-320-24 AC-DC Enclosed Power Supply
5.0/5£65.66
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Power Supply Inter-Tech 300W SFX-M300 SFX Retail
5.0/5£81.99
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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
5.0/5£84.99
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Gigabyte UD750GM PG5 ICE 80 Plus Gold Fully Modular 750w PCIe 5.0 White Power Supply Unit, ATX 3.1, 12VHPWR GPU Connector, Flat Cables, 10 Year Warranty
5.0/5£89.99
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Inter-Tech Argus RGB-500W II Power Supply Unit 20+4 Pin ATX Black
4.9/5£87.99
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EnhanBili Best Price Mean Well LRS-350-12 350W 12V 30A Switching Power Supply
4.8/5£30.66
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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
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MSI MAG A650BE Gaming Power Supply - Certified 80 Plus Bronze 650W - Semi-Modular - Low Noise PSU ATX
4.8/5£94.03
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TRENDnet Hardened Industrial SFP to Gigabit UPoE Media Converter, IP30 Rated Housing, Includes DIN-rail & Wall Mounts, Operating Temp. -40 to 75 °C (-40 to 167 °F), TI-UF11SFP
4.8/5£94.68
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NZXT C850 Gold Core - 850W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Platinum - Fully Modular - PCIe 5.1 600W 12V-2x6 - Zero RPM Fan - 105°C Capacitors - Black
4.8/5£99.51
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MSI MAG A650BN - 650w bronze
4.7/5£39.98
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MSI MAG A550BN Power Supply Unit, UK Plug - 550W, 80 Plus Bronze Certified, ATX PSU, 12V Single-Rail, DC-to-DC Circuit, 120mm Fan - 5 Year Warranty
4.7/5£39.99
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CORSAIR CX750 ATX 750W Power Supply - 80 Plus Bronze Certified - Low Noise - Sheathed Cables - Non-Modular - EU - Black
4.7/5£40.17
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Corsair CP-9020122-UK CX Series 650 W CX650 ATX/EPS 80 PLUS Bronze 650W Power Supply Unit - Black
4.7/5£70.32
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MSI MPG A850G PCIE5 Power Supply Unit, UK Plug - 850W, 80 Plus Gold Certified, Fully Modular ATX 3.0, PCIe 5.0 GPU Support, Japanese 105°C Capacitors, 0% RPM Mode, Flat Cables - 10 Year Warranty
4.7/5£89.99
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Seasonic Core GX ATX 3 2024 650W Fully Modular 80+ Gold PCIE 5.1 Power Supply/PSU ATX3.1
4.7/5£95.47
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MSI MAG A650BN Power Supply Unit, UK Plug - 650W, 80 Plus Bronze Certified, ATX PSU, 12V Single-Rail, DC-to-DC Circuit, 120mm Fan - 5 Year Warranty
4.6/5£39.98
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CORSAIR CX550 80 PLUS Bronze Non Modular Low-Noise ATX 550 Watt Power Supply - UK - Black
4.6/5£39.98
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CORSAIR CX650 80 PLUS Bronze Non Modular Low-Noise ATX 650 Watt Power Supply - UK - Black
4.6/5£44.99
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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
4.6/5£57.19
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Gigabyte 750W ATX 12V Standard Power Supply - P750BS - 80 PLUS Bronze
4.6/5£64.49
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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£79.99
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CORSAIR RM650e (2025) Fully Modular ATX Power Supply with Low Noise and 12V-2x6 Cable - ATX 3.1 & PCIe 5.1, Cybenetics Gold Efficiency, 105°C Capacitors, Modern Standby Mode - Black
4.6/5£79.99
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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£85.99
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ASUS TUF Gaming 750W Gold (750 Watt, Fully Modular Power Supply, 80+ Gold Certified, ATX 3.1 Compatible, Military-grade Components, Dual Ball Bearing, Axial-tech Fan, PCB Coating, 10 Year Warranty)
4.6/5£100
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Silverstone 24 Pin ATX zu 24 Pin Kabel 350mm - schwarz
4.5/5£29.76
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MSI MAG A550BN 550W Power Supply
4.5/5£39.99
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Corsair Premium Individually Sleeved PSU Cables Starter Kit Type 4 Gen 4 – Red/Black
4.5/5£39.99
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GIGABYTE P650G PCIE 5.1 Power Supply - PCIe 5.1, 80 Plus Silver, 120mm Fan, ATX 3.1 Compliant, EU Plug
4.5/5£53
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Inter-Tech Mini-ITX PSU 200W | 88882190
4.5/5£59.99
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Cooler Master MWE 850 Gold V2 Fully Modular PSU (UK Plug) - 80 PLUS Gold 850W Power Supply Unit, Flat Black Cabling, 120mm HDB Fan, High-Temperature Threshold
4.5/5£67.4
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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£70.02
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CORSAIR RM650e (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
4.5/5£74.9
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MSI MAG 850W Power Supply 80 Plus Gold - ATX 3.0 PCIe 5.0 Ready - 12VHPWR [MAG A850GL PCIE5]
4.5/5£78.53
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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£86.04
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Asus Prime 750W Gold Gaming PSU, Double Ball Bearing Fan, Fully Modular, 80+ Gold, ATX 3.0, PCIe 5.0
4.5/5£99.68
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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, Black
4.4/5£37.93
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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£41
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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
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Thermaltake Tt Smart BX3 550W (null Watt)
4.4/5£80.15
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Thermaltake CL-F056-PL14SW-A Riing Plus 14 LED RGB Radiator Fan - Black (Pack of 3)
4.4/5£93.2
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ENERMAX MAXPRO IV 750 Watt Non-Modular ATX Gaming PC Power Supply Individual Mesh Sleeve Cable 80 Plus Low Noise 120 mm Fan Japan Capacitor with 5-Way Protection Circuit EMP750W
4.4/5£98.27
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GIGABYTE P550SS Power Supply - PCIe 5.0, 80 PLUS Silver, 120mm Fan, ATX 3.0 compatible, UK Plug
4.3/5£41.31
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JUSTOP Black 750W PSU, Switching Power Supply, Computer Desktop PC ATX, 120mm Fan, 8-Pin 12V, 6+2 Pin PCI-E, 6x SATA
4.2/5£32.95
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Mars Gaming MPB750, PC Power Supply 750W ATX, 6 Years Warranty, 80Plus Bronze 230V EU, 90% Efficiency, 120mm FDB Fan with AI-RPM Technology and Anti-Vibration System, White
4.2/5£54.61
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Aerocool MIRAGEGOLD650, PC Power Supply 650W, RGB Infinity Mirror, 80Plus Gold, Japanese Capacitors
4.2/5£73.01
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Itek Power Supply for PC GF650 EVO - 650W HDB Hydraulic Dynamic Bearing 12mm Active PFC Protection Efficiency Certification 80 Plus Gold Semi Modular Free Plug Giapp Capacitors
4.2/5£93.32
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Tacens RADIX VII AG 600, Full Modular 600W ATX Power Supply, 10 Years Warranty, 80Plus Silver, +87% Efficiency, 140mm FDB Fan with AI-RPM Technology, Japanese 105º Capacitors, Black
4.1/5£58.38
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TOOQ TQAPOLO-700SP - 700W ATX Power Supply with Active PFC, Colour Black
4.0/5£40.37
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Endorfy Vero L5 Bronze 600 W – Non Modular ATX Power Supply, 80 PLUS Bronze, 105°C-Rated Capacitors, 2×PCI-E 8-PIN (6+2)
4.0/5£48.45
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Inter-Tech HiPower SP-750CM Power Supply 750 W, 20+4 Pin, ATX, ATX, Black
3.9/5£66
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Tecnoware Power Supply Typhoon 850W, 80 PLUS Gold, Full Modular, Gaming, Silent 12cm Fan, Japanese 105°C Capacitors, DC-DC Circuit, Flat Cables
3.8/5£33.29
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SilverStone SST-SF160B-ARGB - Shark Force Power Amplified 160mm PWM ARGB Fan
3.7/5£44.36
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ENDORFY Supremo FM6 Gold 850 W – Fully Modular ATX 3.1 & PCIe 5.1 Compliant Power Supply with 12V-2x6 Cable – 105°C-Rated Capacitors, Modern Standby Mode – Black
3.6/5£80.4
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MSI MAG A650BNL Power Supply Unit, 650W, 80 PLUS Bronze, ATX PSU
3.3/5£59.99
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Gigabyte UD750GM PG5 V2 80 Plus Gold Fully Modular 750w PCIe 5.0 Power Supply Unit, ATX 3.1, 12VHPWR GPU Connector, Flat Cables, 10 Year Warranty
3.3/5£79.99
Buy on Amazon
VIDA 650W Heracles Black ATX Gaming PSU, 80 Plus Bronze, 14cm Ultra-Quiet FDM Fan, Flat Black Cables, Power Lead Not Included
0.0/5£44
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VIDA 750W Heracles White ATX Gaming PSU, 80 Plus Bronze, 14cm Ultra-Quiet FDM Fan, Flat White Cables, Power Lead Not Included
0.0/5£48.93
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VIDA 500W ATX PSU, 80 Plus Bronze, Fluid Dynamic Ultra-Quiet Fan, PCIe, Flat White Cables, Power Lead Not Included, White
0.0/5£54.99
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