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PC Power Supplies

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90YE00N3-B0NA00
ASUS ROG Loki 850W 80+ Platinum SFX-L PSU Power Supply
  • 850 W Wattage
  • Fully-Modular
  • 80 PLUS Platinum
  • Fan Size: 1 x 120mm
  • Lambda A Certification
  • 80 PLUS PlatinumCertified
Christmas Deal
£149.99
was £199.99SAVE £50.00
delivery
Pay in 3 with 0% Interest*
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90YE00N4-B0NA00
ASUS ROG Loki 750W 80+ Platinum SFX-L PSU Power Supply
  • 750 W Wattage
  • Fully-Modular
  • 80 PLUS Platinum
  • Fan Size: 1 x 120mm
  • SFX-L Form Factor
  • PCIe Gen 5.0 Ready
Christmas Deal
£129.99
was £174.99SAVE £45.00
delivery
Pay in 3 with 0% Interest*
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90YE00S3-B0NA00
(2)
ASUS TUF Gaming 750W 80 PLUS Gold Fully Modular Power Supply
  • 750 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 135mm
  • Military-grade Certification
  • Dual ball fan bearings
£79.99
was £119.99SAVE £40.00
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MAG A750GL PCIE5
(5)
MSI MAG A750GL 750W Full Modular 80+ Gold PCIe 5.0 Compact Power Supply
  • 750 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 120mm
  • Black Colour
  • 5 Year Warranty
£99.99
was £149.99SAVE £50.00
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PS-TPD-1200FNFAGE-H
Thermaltake TOUGHPOWER GF A3 1200W 80+ Gold Full Modular Power Supply
  • 1200 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 120mm
  • Black Colour
  • 10 Years Warranty
£172.99
was £199.99SAVE £27.00
delivery
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BN327
be quiet! System Power 10 550W 80+ Bronze Wired Power Supply
  • 550 W Wattage
  • Fully-Modular
  • 80 PLUS Bronze
  • Fan Size: 1 x 120mm
  • Black Colour
  • 5 Year Warranty
£48.99
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90YE00W0-B0NA00
£269.90
delivery
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90YE00W2-B0NA00
£179.90
delivery
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90YE00W1-B0NA00
£239.90
delivery
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MPE-6501-AFAAG-UK
(2)
Cooler Master MWE 650 V2 ATX 80 PLUS Gold PSU Power Supply
  • 650 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 120mm
  • Black Colour
  • 5 Year Warranty
£99.00
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PS-TPD-0650FNFAGE-H
Thermaltake TOUGHPOWER GF A3 650W 80+ Gold Full Modular Power Supply
  • 650 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 120mm
  • Black Colour
  • 10 Years Warranty
£77.99
was £109.99SAVE £32.00
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90YE00P0-B0NA00
ASUS ROG Strix 1200W Gold Aura Edition Power Supply Unit 20+4 Pin ATX PCIe 5.0 RGB Lighting
  • 1200W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 135 mm
  • Aura Sync
  • 80 Plus Gold Certification
£162.99
delivery
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GP-UD750GM PG5
Gigabyte UD750GM 80 Plus Gold 750W Fully-Modular Power Supply
  • 750W Wattage
  • Fully-Modular
  • Fan Size: 1 x 120mm
  • Black Colour
  • 5 Years Warranty
  • GP-UD750GM PG5
Christmas Deal
£89.99
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GP-UD850GM PG5 V2
Gigabyte UD850GM 80 Plus Gold 850W Fully-Modular Power Supply
  • 850W Wattage
  • Fully-Modular
  • Fan Size: 1 x 120 mm
  • Black Colour
  • 5 Years Warranty
  • GP-UD850GM PG5 V2
£95.99
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GP-UD1000GM PG5 V2
Gigabyte UD1000GM 80 Plus Gold 1000W Fully-Modular Power Supply
  • 1000W Wattage
  • Fully-Modular
  • Fan Size: 1 x 120 mm
  • Black Colour
  • 5 Years Warranty
  • GP-UD1000GM PG5 V2
Christmas Deal
£121.99
delivery
Pay in 3 with 0% Interest*
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MAG A850GL PCIE5
(12)
MSI MAG A850GL 850W Full Modular 80+ Gold PCIe 5.0 Compact Power Supply
  • 850 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 120mm
  • Black Colour
  • 5 Year Warranty
£114.99
delivery
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PS-TPD-1650FNFAGE-4
(1)
Thermaltake Toughpower GF3 1650W 80+ Gold Fully-Modular Power Supply
  • 1650 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 140mm
  • Black Colour
  • 10 Years Warranty
£349.99
delivery
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CP-9020259-UK
Corsair HX1000i V2 1000W PSU Fully Modular 80+ Platinum ATX 3.0 Power Supply
  • 1000 W Wattage
  • Fully-Modular
  • 80 PLUS Platinum
  • Fan Size: 1 x 140mm
  • Black Colour
  • 10 Years Warranty
£229.99
delivery
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GMX-GX850
GameMax GX850W Modular 80 Plus Gold Black Power Supply
  • 850 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 120mm
  • Black Colour
  • 2 Years Warranty
£77.99
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MPX-7503-AFAG-BUK
Cooler Master GX3 750 ATX 80 PLUS Gold Power Supply
  • 750 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 135mm
  • Wattage: 750 W
  • 24-pin ATX
£92.99
was £120.00SAVE £27.01
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MAG A750BN PCIE5
MSI MAG A750BN 750W 80+ Bronze PCIe 5.0 Power Supply
  • 750 W Wattage
  • 80 PLUS Bronze
  • Fan Size: 1 x 120mm
  • Black Colour
  • 5 Year Warranty
  • MAG A750BN PCIE5
£69.99
was £149.99SAVE £80.00
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MAG A650BN
MSI MAG A650BN 650W 80+ Bronze ATX PSU Power Supply
  • 650 W Wattage
  • Fully-Wired
  • 80 PLUS Bronze
  • Fan Size: 1 x 120mm
  • Black Colour
  • 5 Year Warranty
£55.99
was £99.99SAVE £44.00
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CP-9020231-UK
Corsair RM White Series 750W 24-pin 80+ Gold Power Supply
  • 750 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 140mm
  • White Colour
  • 10 Years Warranty
£120.99
delivery
Pay in 3 with 0% Interest*
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CP-9020262-UK
(11)
Corsair RM750e Fully Modular Low-Noise ATX 80 PLUS Gold Power Supply
  • 750 W Wattage
  • Fully-Modular
  • 80 PLUS Gold
  • Fan Size: 1 x 120mm
  • Black Colour
  • 7 Years Warranty
£114.99
delivery
Pay in 3 with 0% Interest*

PC POWER SUPPLIES

A power supply unit (or PSU) is an essential piece to the puzzle when it comes to getting your systems operational and maintaining stable long-term outputs. While other components within your setups may get more attention due to their roles once your systems begin operations, they will never be able to get to that point without the support of an adequate PSU. Here at Box, we stock everything you need for the best custom PC build experience, as well as the tools to help DIY enthusiasts make the necessary alterations to their builds, including an extensive range of power supply units to fit all kinds of builds and budgets.

What to Look for In A PC Power Supply Unit

Some of the most important things to consider when selecting the right PSU are wattage output, cable type and efficiency rating. Ensuring you have sufficient output potential to actually power your components is essential in your search. Certain systems like high-end gaming PCs will require more power outputs than a more basic mini-PC, so understanding what your current build needs should be step one.

The 80 Plus rating of your PSU is important to know as it determines the efficiency and power consumption rate of your power delivery. Typically, anything from 80 Plus Silver and onwards should handle your basic computing demands, but those looking to air on the side of caution may want to invest in an 80 Plus Gold model.

Cable type is important as it determines how you are able to actually integrate your PSU into your PC case. Which type of connection you end up going for can also be directly influenced by your level of experience when it comes to the PC build and maintenance process. Those already very experienced may find no issue opting for a fully-modular cable connection, where you can pick and choose freely which cables you end up utilising. However, the more novice builders may find it safer to stick with the non-modular or semi-modular cable type as they offer a more straightforward installation process.

Best Offers on Pc Power Supplies From Box

Browse our range of PC power supplies and find which model is right for you. We stock leading brands like be quiet! and Cooler Master, which are sure to be found through your builds and existing setups. Once you know what your system needs, the hard part is over and you can begin making your choice. Best offers mean you and your budget might just be in for a treat, so get shopping now.