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    800W - 850W PSUs

    50 Results
    new
    Corsair RM850e 850W ATX 3.1 PCIe 5.1 Cybenetics Platinum Modular Power Supply
    efficiency label
    Corsair RM850e 850W ATX 3.1 PCIe 5.1 Cybenetics Platinum Modular Power Supply
    POW-CRS-09285
    (0)
    Fortify your PC with a reliable CORSAIR RMe Power Supply with a ThermalProtect 12V-2x6 cable featuring Over Temperature Protection (OTP). The RMe series provides efficient Cybenetics Platinum-rated power and the ThermalProtect cable helps protect your GPU from overheating, giving you reliable performance and GPU protection.
    £124.99
    Incl. VAT
    In Stock
    new
    Corsair RM850e 850W ATX 3.1 PCIe 5.1 Platinum Modular Power Supply - White
    efficiency label
    Corsair RM850e 850W ATX 3.1 PCIe 5.1 Platinum Modular Power Supply - White
    POW-CRS-09287
    (0)
    Fortify your PC with a reliable CORSAIR RMe Power Supply with a ThermalProtect 12V-2x6 cable featuring Over Temperature Protection (OTP). The RMe series provides efficient Cybenetics Platinum-rated power and the ThermalProtect cable helps protect your GPU from overheating, giving you reliable performance and GPU protection.
    £124.99
    Incl. VAT
    In Stock
    Top Seller
    MSI MAG A850GL ATX 3.1 PCIe 5.1 850W 80 Plus Gold Modular Power Supply
    efficiency label
    MSI MAG A850GL ATX 3.1 PCIe 5.1 850W 80 Plus Gold Modular Power Supply
    CA-012-MS
    (9)
    • ATX 3.0 compatible, native PCIe 5.0 connector
    • Supports NVIDIA® GeForce RTX™ 40 Series graphics cards
    • Full modular design,Flat cables
    • 80 Plus Gold certified for high efficiency
    • Active PFC design,Industrial level protection with OVP,OCP,OPP,OTP, SCP,UVP
    • 120mm Fluid Dynamic Bearing Fan
    • LLC Full Bridge Topology with DC-DC module design
    £89.99
    Incl. VAT
    In Stock
    Top Seller
    Corsair RM850x 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    efficiency label
    Corsair RM850x 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    POW-CRS-02466
    (1)
    850W, ATX form factor, Fully modular, ATX 3.1 compliant, PCIe 5.1 connectivity, 80 PLUS Gold certificate
    £149.00
    Incl. VAT
    In Stock
    Corsair RMe Series RM850e 850W ATX 3.1 PCIe 5.1 Cybenetics Gold Modular Power Supply
    efficiency label
    Corsair RMe Series RM850e 850W ATX 3.1 PCIe 5.1 Cybenetics Gold Modular Power Supply
    POW-CRS-03875
    (2)
    CORSAIR RMe Series Fully Modular Low-Noise Power Supplies with ATX 3.1 and PCIe 5.1 compliance provide quiet, reliable power with Cybenetics Gold efficiency to a wide variety of PC builds.
    £119.99
    Incl. VAT
    In Stock
    Save 15%
    be quiet! Pure Power 13 M 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    efficiency label
    be quiet! Pure Power 13 M 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    POW-BEQ-05637
    (2)
    Pure Power 13 M 850W is an ATX 3.1 compliant and PCIe 5.1 compatible power supply with semi-passive cooling. It offers peerless dependability with best-in-class features. Pure Power 13 M 850W offers the best combination of features with outstanding compatibility.
    Price reduced from £112.99 to £94.99
    Incl. VAT
    In Stock
    Free Delivery Top Seller
    Aerocool Integrator Gold 850W 80 Plus Gold Modular Power Supply
    efficiency label
    Aerocool Integrator Gold 850W 80 Plus Gold Modular Power Supply
    CA-23T-AE
    (2)
    The most affordable 80Plus Gold power supply unit that delivers high efficiency and stable power output with minimum noise.
    £89.99
    Incl. VAT
    In Stock
    Gigabyte UD850GM PG5 V2 ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    efficiency label
    Gigabyte UD850GM PG5 V2 ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    CA-03K-GI
    (0)
    Intel ATX 3.1 and PCIe Gen 5.1 ready, 100% Japanese capacitors, 120mm smart hydraulic bearing (HYB) fan, 80 PLUS Gold certified, Fully modular design
    £94.99
    Incl. VAT
    In Stock
    Save 10%
    FSP Dagger PRO 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular SFX Power Supply
    efficiency label
    FSP Dagger PRO 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular SFX Power Supply
    POW-FSP-06662
    (0)
    FSP Dagger PRO 850W SFX 80+ Gold ATX 3.1 PCIe 5.1 Modular Power Supply packs serious power in a compact frame — a fully-modular SFX unit delivering 850 W, 80 PLUS Gold efficiency, and native support for ATX 12 V v3.1 / PCIe 5.1 hardware.
    Price reduced from £129.95 to £116.95
    Incl. VAT
    In Stock
    Save 11%
    Seasonic Core GX-850-V2 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    efficiency label
    Seasonic Core GX-850-V2 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    POW-SSC-03647
    (0)
    The Seasonic Core GX ATX 3.1 2024 power supply offers high efficiency, enhanced stability, and quiet operation, ideal for modern gaming rigs and powerful workstations.
    Price reduced from £129.95 to £115.00
    Incl. VAT
    In Stock
    Gigabyte AORUS ELITE P850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply
    efficiency label
    Gigabyte AORUS ELITE P850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply
    POW-GIG-06999
    (0)
    Rev 1.1 - ATX 3.1 and PCIe Gen 5.1 ready, 80 PLUS Platinum certified, 100% Japanese capacitors, 120mm smart Fluid Dynamic Bearing (FDB) fan, Compact design, Fully modular Cables
    £113.99
    Incl. VAT
    In Stock
    Save 4%
    be quiet Dark Power 14 850W 80 Plus Titanium Modular Power Supply
    efficiency label efficiency label
    be quiet Dark Power 14 850W 80 Plus Titanium Modular Power Supply
    POW-BEQ-06576
    (0)
    Introducing the 14th generation, Dark Power is more than just an update. This powerhouse of a power supply stands for the very best we as PSU experts can offer. Among the many features are our internally developed Silent Wings fan, state-of-the-art technology and components of highest quality such as Japanese capacitors. In short: Dark Power is our high-end power supply series. Built for everyone who takes their systems seriously.
    Price reduced from £179.95 to £171.95
    Incl. VAT
    In Stock
    Gigabyte UD850GM PG5 V2 ICE ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply - White
    efficiency label
    Gigabyte UD850GM PG5 V2 ICE ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply - White
    POW-GIG-07002
    (0)
    Intel ATX 3.1 and PCIe Gen 5.1 ready, 100% Japanese capacitors, 120mm smart hydraulic bearing (HYB) fan, 80 PLUS Gold certified, Fully modular design
    £97.99
    Incl. VAT
    In Stock
    Free Delivery
    Phanteks AMP GH 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    Phanteks AMP GH 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    POW-PHK-02519
    (3)
    Modular power supply, 850W, 80 PLUS Gold, ATX 3.1, PCIe Gen 5.1 support, Textured cables included
    £104.99
    Incl. VAT
    In Stock
    Corsair RM850x Shift 850W ATX 3.1 PCIe 5.1 Cybenetics Gold Modular Power Supply
    efficiency label
    Corsair RM850x Shift 850W ATX 3.1 PCIe 5.1 Cybenetics Gold Modular Power Supply
    POW-CRS-06555
    (0)
    CORSAIR RMx SHIFT Series fully modular power supplies boast a revolutionary patent-pending side cable interface to keep all your connections within easy reach, for exceptionally convenient 80 PLUS Gold efficient power.
    £149.95
    Incl. VAT
    In Stock
    Save 19%
    Seasonic Core GC 850W ATX 3.1 PCIe 5.1 80 Plus Gold Power Supply
    efficiency label
    Seasonic Core GC 850W ATX 3.1 PCIe 5.1 80 Plus Gold Power Supply
    POW-SSC-07503
    (0)
    The Seasonic CORE GC Series delivers reliable performance and modern ATX 3.1 compliance at an essential value. Designed for everyday builders and gamers, it embodies Seasonic’s trusted quality in a compact 140 mm design with a durable scratch-resistant finish.
    Price reduced from £104.99 to £84.95
    Incl. VAT
    In Stock
    Gigabyte AORUS ELITE ICE P850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply - White
    efficiency label
    Gigabyte AORUS ELITE ICE P850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply - White
    POW-GIG-06998
    (0)
    Rev 1.1 - ATX 3.1 and PCIe Gen 5.1 ready, 80 PLUS Platinum certified, 100% Japanese capacitors, 120mm smart Fluid Dynamic Bearing (FDB) fan, Compact design, Fully modular Cables
    £118.99
    Incl. VAT
    In Stock
    Asus TUF Gaming 850W ATX 3.1 PCIe 5.0 80 Plus Gold Modular Power Supply
    efficiency label
    Asus TUF Gaming 850W ATX 3.1 PCIe 5.0 80 Plus Gold Modular Power Supply
    CA-060-AS
    (9)
    The TUF Gaming 850W Gold is an efficient, resilient and dependable PSU that’s engineered for the long haul.
    £129.95
    Incl. VAT
    In Stock
    Asus TUF Gaming Gold EVO 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    efficiency label efficiency label
    Asus TUF Gaming Gold EVO 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    POW-ASU-07627
    (0)
    The ASUS TUF Gaming 850W Gold EVO packs military-grade strength, a flagship fan design, and PCB protection for efficient, durable power delivery. The result is a PSU that can reliably fuel your rig for years to come.
    £114.95
    Incl. VAT
    In Stock
    Free Delivery
    Phanteks AMP GH 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply - White
    Phanteks AMP GH 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply - White
    POW-PHK-02520
    (1)
    Modular power supply, 850W, 80 PLUS Gold, ATX 3.1, PCIe Gen 5.1 support, Textured cables included
    £114.95
    Incl. VAT
    In Stock
    Free Delivery
    Lian Li SP Platinum 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular SFX Power Supply
    efficiency label
    Lian Li SP Platinum 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular SFX Power Supply
    POW-LIA-06202
    (0)
    850W SFX PSU, Modular design, 80 PLUS Platinum, Compliant with the ATX 3.1 standard, 92mm FDB fan with Zero RPM mode, Flexible braided cables
    £142.99
    Incl. VAT
    In Stock
    Save 3%
    be quiet! Power Zone 2 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply
    efficiency label
    be quiet! Power Zone 2 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply
    POW-BEQ-04388
    (0)
    Power Zone 2 850W is a power supply with 80 PLUS® Platinum certification and semi-passive zero-RPM cooling for both efficient and quiet gaming sessions.
    Price reduced from £129.95 to £124.99
    Incl. VAT
    In Stock
    Corsair SF Series SF850 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular SFX Power Supply
    efficiency label
    Corsair SF Series SF850 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular SFX Power Supply
    POW-CRS-02469
    (0)
    Outfit your next SFF PC with the CORSAIR SF Series 80 PLUS Platinum SFX Power Supply for compact, ATX 3.1 compliant, fully modular Platinum power.
    £174.95
    Incl. VAT
    In Stock
    Asus Prime 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    efficiency label efficiency label
    Asus Prime 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    POW-ASU-07631
    (0)
    With 80 PLUS and Cybenetics Gold certification, Dual-ball fan bearings, and an 8-year warranty, the ASUS Prime series PSU brings efficient and durable power delivery to high-performance workstations, all-round PCs, and gaming rigs.
    £114.95
    Incl. VAT
    In Stock
    Asus ROG Strix 850W ATX 3.1 PCIe 5.0 80 Plus Platinum Modular Power Supply
    efficiency label
    Asus ROG Strix 850W ATX 3.1 PCIe 5.0 80 Plus Platinum Modular Power Supply
    POW-ASU-03790
    (1)
    ROG Strix 850W Platinum is a cool and quiet PSU with stable power delivery, engineered for efficiency with GaN MOSFET and intelligent stabilizer in striking style.
    £159.95
    Incl. VAT
    In Stock
    Save 26%
    Antec GSK 850 V2 850w ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    efficiency label
    Antec GSK 850 V2 850w ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    POW-ATC-06483
    (0)
    Introducing the GSK V2 ATX3.1 power supply, designed with the ultimate performance and stability in mind for the gaming and enthusiast market. With advanced features like ATX 3.1, PCIe 5.1, unparalleled stability, and 80 PLUS® Gold-certified efficiencies, you can expect brilliant performance from your system.
    Price reduced from £129.95 to £94.99
    Incl. VAT
    In Stock
    Free Delivery
    Lian Li SP Platinum 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular SFX Power Supply - White
    efficiency label
    Lian Li SP Platinum 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular SFX Power Supply - White
    POW-LIA-06203
    (1)
    850W SFX PSU, Modular design, 80 PLUS Platinum, Compliant with the ATX 3.1 standard, 92mm FDB fan with Zero RPM mode, Flexible braided cables
    £142.99
    Incl. VAT
    In Stock
    Save 25%
    Aerocool SMART G1 850W ATX 3.1 PCIe 5.1 80 Plus Gold Power Supply
    efficiency label
    Aerocool SMART G1 850W ATX 3.1 PCIe 5.1 80 Plus Gold Power Supply
    POW-AER-05578
    (0)
    850W PSU, Hardwired cables, Compact ATX form factor, 80 PLUS Gold rating, Complies with ATX 3.1 and PCIe 5.1 standards, 135mm FDB fan
    Price reduced from £106.99 to £79.99
    Incl. VAT
    In Stock
    Asus Prime 850W ATX 3.0 PCIe 5.0 80 Plus Gold Modular Power Supply
    efficiency label
    Asus Prime 850W ATX 3.0 PCIe 5.0 80 Plus Gold Modular Power Supply
    POW-ASU-04715
    (0)
    ASUS Prime 850W Gold PSU brings efficient and durable power delivery to all-round PCs, and gaming rigs
    £114.95
    Incl. VAT
    In Stock
    Save 12% Free Delivery
    Lian Li SP850 V2 ATX 3.1 PCIe 5.0 80 Plus Gold Modular SFX Power Supply
    efficiency label
    Lian Li SP850 V2 ATX 3.1 PCIe 5.0 80 Plus Gold Modular SFX Power Supply
    POW-LIA-06173
    (0)
    850W PSU, Fully modular, Compact form factor, 80 PLUS Gold rating, Complies with ATX 3.1 standard, Zero RPM mode
    Price reduced from £124.99 to £109.99
    Incl. VAT
    In Stock
    Aerocool Integrator 850W 80 Plus Bronze Power Supply
    Aerocool Integrator 850W 80 Plus Bronze Power Supply
    POW-AER-01512
    (0)
    Aerocool Integrator 850W 80 Plus Bronze Power Supply
    £64.96
    Incl. VAT
    In Stock
    Save 8%
    Antec NE850 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply
    efficiency label efficiency label
    Antec NE850 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply
    POW-ATC-08119
    (0)
    Introducing the NeoECO Platinum ATX3.1 power supply, crafted to deliver exceptional performance and rock-solid stability for gamers and enthusiasts. Featuring next-generation ATX 3.1 and PCIe 5.1 support, high-quality Japanese capacitors, and 80 PLUS® Platinum efficiency, it ensures outstanding and consistent power delivery.
    Price reduced from £114.95 to £104.95
    Incl. VAT
    In Stock
    Antec HCG 850 Pro 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply
    efficiency label
    Antec HCG 850 Pro 850W ATX 3.1 PCIe 5.1 80 Plus Platinum Modular Power Supply
    POW-ATC-02745
    (0)
    HCG850 PRO Platinum ATX 3.1 FOR THE ULTIMATE GAMER
    £129.95
    Incl. VAT
    In Stock
    Save 27%
    FSP VITA-850GD 850W ATX 3.1 PCIe 5.1 80 Plus Gold Power Supply
    efficiency label
    FSP VITA-850GD 850W ATX 3.1 PCIe 5.1 80 Plus Gold Power Supply
    POW-FSP-07043
    (0)
    The FSP VITA GD 850W delivers a solid 850 W of continuous power with an 80 PLUS Gold certification for efficiency of ≥90 % at typical load, helping reduce wasted energy and heat. It’s built to the latest ATX 3.1 standard and PCIe Gen 5.1-ready, so it’s compatible with current and next-gen components.
    Price reduced from £109.99 to £79.99
    Incl. VAT
    In Stock
    Save 11%
    Seasonic Core GX-850-V2 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply - White
    efficiency label efficiency label
    Seasonic Core GX-850-V2 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply - White
    POW-SSC-05299
    (0)
    Seasonic CORE GX White Series – ATX 3.1 & PCIe 5.1 ready, 80 PLUS Gold certified, fully modular with braided white cables, quiet HDB fan, 7-year warranty.
    Price reduced from £134.90 to £118.96
    Incl. VAT
    In Stock
    Asus ROG Loki SFX-L 850W ATX 3.1 PCIe 5.0 80 Plus Platinum Modular Power Supply - White
    efficiency label
    Asus ROG Loki SFX-L 850W ATX 3.1 PCIe 5.0 80 Plus Platinum Modular Power Supply - White
    CA-06F-AS
    (4)
    ROG Loki 850W Platinum White Edition, The Quietest SFX-L PSU.
    £209.99
    Incl. VAT
    In Stock
    Asus ROG Loki SFX-L 850W ATX 3.1 PCIe 5.0 80 Plus Platinum Modular Power Supply
    efficiency label
    Asus ROG Loki SFX-L 850W ATX 3.1 PCIe 5.0 80 Plus Platinum Modular Power Supply
    CA-05X-AS
    (3)
    • 850 W 100 - 240 V
    • Motherboard power connector: 24-pin ATX
    • PC SFX 80 PLUS Platinum
    • 12 cm
    • Black, Silver
    £194.95
    Incl. VAT
    In Stock
    Save 5%
    be quiet! Pure Power 12 850W 80 Plus Gold Power Supply 80 Plus Gold Power Supply
    efficiency label
    be quiet! Pure Power 12 850W 80 Plus Gold Power Supply 80 Plus Gold Power Supply
    POW-BEQ-04390
    (0)
    Pure Power 12 850W is ATX 3.1 compliant and PCIe 5.1 compatible and offers 80 PLUS® Gold efficiency and a silence-optimized 120mm be quiet! fan.
    Price reduced from £89.99 to £85.00
    Incl. VAT
    In Stock
    Gigabyte GAMING 850GM PG5 ICE 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    efficiency label efficiency label
    Gigabyte GAMING 850GM PG5 ICE 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    POW-GIG-08800
    (0)
    The GIGABYTE GAMING GM PG5 Power Supply Range are all 80 PLUS Gold, fully modular ATX 3.1 power supplies built for modern gaming systems. Each power supply in this range provides stable, efficient, and ultra-quiet power with intelligent safeguards to ensure peak performance when the stakes are highest.
    £109.99
    Incl. VAT
    In Stock
    Gigabyte GAMING 850GM PG5 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    efficiency label efficiency label
    Gigabyte GAMING 850GM PG5 850W ATX 3.1 PCIe 5.1 80 Plus Gold Modular Power Supply
    POW-GIG-08801
    (0)
    The GIGABYTE GAMING GM PG5 Power Supply Range are all 80 PLUS Gold, fully modular ATX 3.1 power supplies built for modern gaming systems. Each power supply in this range provides stable, efficient, and ultra-quiet power with intelligent safeguards to ensure peak performance when the stakes are highest.
    £109.99
    Incl. VAT
    In Stock

    PC Power Supplies 800W - 850W PSUs


    Asus ROG Loki SFX-L 850W Platinum Power Supply - White

    Game like never before with an 850W PC power supply from Overclockers UK, expertly designed to offer the best possible power delivery for the latest gaming hardware. Whether you're assembling a new gaming PC or upgrading your current computer, our selection of 850W PSUs will ensure your gaming experience remains unrivalled. What’s more, you can take your pick from a huge range of industry-leading brands, including Corsair, EVGA, Seasonic, and more!


    PSU Blog Image

    Want to Read More?

    Where do all these cables go? PSUs have a lot of cables, and knowing which one goes where is super important! In this guide on the Overclockers UK Blog, we’ve covered everything you need to know about PC power supply cables and connectors.

    Read More