Best Power Supplies Under £400 (2026)

Every power supply we list under £400

In order of Amazon customer rating, then price. The customer rating is Amazon’s, not ours.

1. 

   ENDORFY Vero L5 Bronze 500W, 80plus Bronze Certified, Efficient and Quiet ATX Power, 1x PCI-E 8-PIN (6 plus 2), UK Plug

   5.0/5

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2. 

   Power Supply Inter-Tech 300W SFX-M300 SFX Retail

   5.0/5

   £79.99Checked 10:16 BST, 17 Oct · Details

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3. 

   be quiet! Pure Power 13 M 1000W Power Supply, 80 PLUS® Gold Certification, ATX 3.1 PSU, Support For PCIe 5.1 GPUs, Semi-Passive 120mm be quiet! Fan, LLC Technology, Single Rail, For Overclocked GPUs

   5.0/5

   £118.99Checked 11:00 BST, 17 Oct · Details

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4. 

   PSU Endorfy Supremo FM5 Gold 650 W

   5.0/5

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5. 

   CORSAIR RM1000x SHIFT (2025) Fully Modular ATX Power Supply – Modular Side Interface, Native 12V-2x6 Cable, ATX 3.1 & PCIe 5.1, Fan-Speed Control, 105°C-Rated Capacitors, Cybenetics Gold – Black

   5.0/5

   £129.98Checked 11:00 BST, 17 Oct · Details

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6. 

   NZXT C850 Gold ATX 3.1 (2024) - Low Noise Fully Modular PC Gaming Power Supply - 850W - 80 Plus Gold - 12V Connector - Zero Fan Mode - 100% Japanese Capacitors - Black -

   5.0/5

   £144.99Checked 10:16 BST, 17 Oct · Details

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7. 

   ASROCK TC-1300T, PSU, 1300W, 80 Plus Titanium, 135 mm, Modular, PCI-E 5.1 (12+4pin) x2, PCI-E (6+2 Pin) x8, SATA (5 Pin) x9

   5.0/5

   £326.85Checked 10:00 BST, 17 Oct · Details

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8. 

   CORSAIR RM1000e (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

   4.9/5

   £119.99Checked 10:00 BST, 17 Oct · Details

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9. 

   Fractal Design Ion 3 Gold 1000W Black 80 PLUS Gold Certified Fully Modular ATX12V 3.1 Power Supply Unit PSU

   4.9/5

   £129.98Checked 11:01 BST, 17 Oct · Details

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10. 

    Fractal Design Ion 3 Gold 1000W White 80 PLUS Gold Certified Fully Modular ATX12V 3.1 Power Supply Unit PSU

    4.9/5

    £129.98Checked 11:01 BST, 17 Oct · Details

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11. 

    MAG A1000GL PCIE5 WHITE

    4.9/5

    £202.24Checked 10:16 BST, 17 Oct · Details

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12. 

    Seasonic Prime Fanless TX-700 700W PC Power Supply, Black, 4x PCIe

    4.9/5

    £252.83Checked 11:46 BST, 17 Oct · Details

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13. 

    be quiet! System Power 11 550W 80Plus Bronze ATX 3.1 PSU

    4.8/5

    £50Checked 10:31 BST, 17 Oct · Details

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14. 

    be quiet! 450W System Power 11 Psu 80+ Bronze Fully Wired Temp-Controlled Fan At

    4.8/5

    £50.47Checked 10:16 BST, 17 Oct · Details

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15. 

    NZXT C750 Gold Core - 750W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Platinum - Fully Modular - PCIe 5.1 300W 12V-2x6 - Zero RPM Fan - 105°C Capacitors - Black

    4.8/5

    £84.96Checked 10:16 BST, 17 Oct · Details

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16. 

    MSI MAG A650BE Gaming Power Supply - Certified 80 Plus Bronze 650W - Semi-Modular - Low Noise PSU ATX

    4.8/5

    £89.47Checked 11:16 BST, 17 Oct · Details

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17. 

    Inter-Tech Argus RGB-500W II Power Supply Unit 20+4 Pin ATX Black

    4.8/5

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18. 

    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

    £100Checked 11:01 BST, 17 Oct · Details

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19. 

    Gigabyte AORUS ELITE P850W 80 Plus Platinum Fully Modular PCIe 5.1 ICE Power Supply Unit, ATX 3.1, 12V-2x6 GPU Connector, Flat Cables, 10 Year Warranty

    4.8/5

    £119.99Checked 10:31 BST, 17 Oct · Details

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20. 

    NZXT C850 Gold ATX 3.1 - Fully Modular Low-Noise PC Gaming Power Supply - 850 Watts - 80 PLUS Gold - 12V-2x6 Connector - Zero Fan Mode - 100% Japanese Capacitors - Black

    4.8/5

    £123.99Checked 10:16 BST, 17 Oct · Details

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21. 

    ASUS ROG Strix 750W Gold Aura Edition (Fully Modular Power Supply, 80+ Gold Certified, ATX 3.0 Compatible, PCIe Gen 5.0 Ready, Dual Ball Bearing, Axial-tech Fan, Aura Sync, 10 Year Warranty)

    4.8/5

    £137.50Checked 11:15 BST, 17 Oct · Details

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22. 

    Corsair RM850x 80 PLUS Gold 850 Watt Fully Modular ATX Power Supply Unit - Black

    4.8/5

    £144.99Checked 11:45 BST, 17 Oct · Details

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23. 

    MSI Computers, MAG A850GLS PCIE5

    4.8/5

    £158.63Checked 10:45 BST, 17 Oct · Details

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24. 

    Asus ROG Strix 850W Platinum PSU, Fully Modular, 80+ Platinum, ATX 3.1, PCIe 5.0, GaN MOSFET, Intelligent Voltage Stabilizer

    4.8/5

    £159.95Checked 09:46 BST, 17 Oct · Details

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25. 

    MAG A1000GL PCIE5

    4.8/5

    £161.79Checked 11:30 BST, 17 Oct · Details

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26. 

    EVGA 220-G5-0750-X1 Super Nova 750 G5, 80 Plus Gold 750W, Fully Modular, ECO Mode with Fdb Fan, 10 Year Warranty, Compact 150mm Size, Power Supply

    4.8/5

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27. 

    CORSAIR RM Series (2021), RM750, 750 Watt, 80 Plus Gold Certified, Fully Modular Power Supply

    4.8/5

    £283.10Checked 11:00 BST, 17 Oct · Details

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28. 

    CORSAIR CX550 80 PLUS Bronze Non Modular Low-Noise ATX 550 Watt Power Supply - UK - Black

    4.7/5

    £39.98Checked 11:16 BST, 17 Oct · Details

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29. 

    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

    4.7/5

    £44.97Checked 10:31 BST, 17 Oct · Details

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30. 

    MSI MAG A650BN - 650w bronze

    4.7/5

    £44.99Checked 11:41 BST, 17 Oct · Details

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31. 

    GIGABYTE P650G PCIE 5.1 Power Supply - PCIe 5.1, 80 Plus Silver, 120mm Fan, ATX 3.1 Compliant, EU Plug

    4.7/5

    £75.49Checked 11:46 BST, 17 Oct · Details

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32. 

    Seasonic Core GX ATX 3 2024 650W Fully Modular 80+ Gold PCIE 5.1 Power Supply/PSU ATX3.1

    4.7/5

    £88.94Checked 11:15 BST, 17 Oct · Details

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33. 

    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

    4.7/5

    £89Checked 10:31 BST, 17 Oct · Details

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34. 

    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

    4.7/5

    £89.99Checked 09:46 BST, 17 Oct · Details

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35. 

    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

    £89.99Checked 10:31 BST, 17 Oct · Details

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36. 

    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

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37. 

    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)

    4.7/5

    £94.99Checked 11:16 BST, 17 Oct · Details

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38. 

    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 – White

    4.7/5

    £94.99Checked 10:16 BST, 17 Oct · Details

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39. 

    CORSAIR RM1000e (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

    4.7/5

    £110.99Checked 11:00 BST, 17 Oct · Details

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40. 

    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

    £111.50Checked 11:15 BST, 17 Oct · Details

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41. 

    Be Quiet! Pure Power 13M ATX 3.1-850w - 80 Plus Gold

    4.7/5

    £112.57Checked 10:30 BST, 17 Oct · Details

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42. 

    CORSAIR RM1200x SHIFT Fully Modular ATX Power Supply - 80 PLUS Gold - ATX 3.1 - PCIe 5.1 - Zero RPM - Modular Side Interface - White

    4.7/5

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43. 

    CORSAIR RM850x Fully Modular Quiet ATX Power Supply - ATX 3.1 Compliance - PCIe 5.1 Support - Cybenetics Gold Efficiency - Native 12V - 2x6 Connector - Black

    4.7/5

    £165.49Checked 11:16 BST, 17 Oct · Details

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44. 

    Asus ROG Strix 1000W Platinum White PSU, Fully Modular, 80+ Platinum, ATX 3.1, PCIe 5.0, GaN MOSFET, Intelligent Voltage Stabilizer

    4.7/5

    £197.99Checked 10:30 BST, 17 Oct · Details

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45. 

    Seasonic Focus V4 GX-850 (ATX3) -850W -80+ Gold -Fully Modular -ATX Form Factor -Japanese Premium Capacitor -10 Year Warranty -Nvidia RTX 30/40 Super and AMD GPU Compatible -Focus V4

    4.7/5

    £237.16Checked 11:31 BST, 17 Oct · Details

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46. 

    Corsair RM Series, RM850, 850 Watt, 80+ Gold Certified, Fully Modular Power Supply, Microsoft Modern Standby (CP-9020196-NA)

    4.7/5

    £375.89Checked 11:45 BST, 17 Oct · Details

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47. 

    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

    4.6/5

    £42.99Checked 10:46 BST, 17 Oct · Details

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48. 

    CORSAIR CX650 80 PLUS Bronze Non Modular Low-Noise ATX 650 Watt Power Supply - UK - Black

    4.6/5

    £44.99Checked 11:16 BST, 17 Oct · Details

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49. 

    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

    £44.99Checked 11:31 BST, 17 Oct · Details

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50. 

    MSI MAG A750BN PCIE 5.0 Power Supply Unit, 750W, 80 PLUS Bronze, PCIe 5.0 GPU Support, ATX PSU

    4.6/5

    £54.99Checked 11:01 BST, 17 Oct · Details

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51. 

    MSI MAG A650BNL Power Supply Unit, 650W, 80 PLUS Bronze, ATX PSU

    4.6/5

    £59Checked 10:31 BST, 17 Oct · Details

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52. 

    ASUS Prime 750W Bronze Power Supply

    4.6/5

    £69.99Checked 09:46 BST, 17 Oct · Details

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53. 

    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

    £70.99Checked 10:15 BST, 17 Oct · Details

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54. 

    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

    4.6/5

    £70.99Checked 11:46 BST, 17 Oct · Details

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55. 

    Corsair CP-9020122-UK CX Series 650 W CX650 ATX/EPS 80 PLUS Bronze 650W Power Supply Unit - Black

    4.6/5

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56. 

    ENDORFY Supremo FM5 Gold 750 W unité d'alimentation d'énergie 18+10 pin ATX ATX Noir

    4.6/5

    £73.01Checked 10:01 BST, 17 Oct · Details

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57. 

    Thermaltake Toughpower GT 850W | ATX 3.1 | PCIe 5.1 | 80+ Gold | Modular

    4.6/5

    £80.39Checked 10:00 BST, 17 Oct · Details

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58. 

    Fractal Design Anode SFX Bronze 450W

    4.6/5

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59. 

    THERMALTAKE Toughpower GT 750W | ATX 3.1 | Modular Power Supply | 80Plus Gold

    4.6/5

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60. 

    Asus Prime 750W Gold Gaming PSU, Double Ball Bearing Fan, Fully Modular, 80+ Gold, ATX 3.0, PCIe 5.0

    4.6/5

    £97.99Checked 10:02 BST, 17 Oct · Details

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