It's essential you use the correct power supply for your computer. Whether you're upgrading, building a new set up, or have a broken supply, we have plenty of high-quality, low cost power supplies available at Ebuyer.
PC Computer Power Supply Units (81 products)
Read more about PC Computer Power Supply Units
Sponsored 
Thermaltake Berlin Pro RGB 650W 80+ Bronze PSU
- 650W 80+ Bronze Rated
- High quality Japanese main capacitor.
- 10 LED Lights including 256 Colors RGB Cycle
- Prepared for the new Intel processors Kabylake
£ 62.98 inc. vat
£74.49save £11.51£ 52.48 ex. vat
£62.07save £9.59
CORSAIR CV Series CV550 - 550 Watt Power Supply
- 80 PLUS Bronze Certified
- Full Continuous Power
- Low-Noise Cooling
- Black Sleeving and Casing
- Three-Year Warranty
£ 44.99 inc. vat
£50.00save £5.01£ 37.49 ex. vat
£41.66save £4.17
Aerocool Cylon 500W Power Supply 80 Plus
- 80Plus 230V EU Standard Certified for up to 85%+ efficiency
- Silent 12cm black fan with optimized thermal fan speed control...
£ 29.98 inc. vat
£36.98save £7.00£ 24.98 ex. vat
£30.81save £5.83
Corsair CXM 750W Semi Modular 80+ Bronze Power Supply
- Black Coloured PSU with a 120mm Silent Cooling Fan
- Equipped with a Single 12v Rail Delivering upto 62 Amps
- Equipped with 2 PCI-E Connectors for Graphics Cards
£ 99.99 inc. vat
£ 83.32 ex. vat
0% Interest offers available
Aerocool Cylon 700w 80+ Psu
- Wattage: 700W
- Non-Modular
- 80 PLUS White
- 120mm Fan
- 2 Year Warranty
£ 38.99 inc. vat
£42.39save £3.40£ 32.49 ex. vat
£35.32save £2.83
Thermaltake TR2 S Series 700W Power Supply 80 Plus
- Ultra-Quiet 120mm Fan
- Multiple Connectors
- 80 Plus 230V Standard Certified and Kaby Lake-Ready
- High Quality Components
£ 64.98 inc. vat
£ 54.15 ex. vat
Thermaltake Litepower 550W PSU
- 550W PSU
- Ultra-Quiet Fan
- Elongated Sleeved Cables
- Utmost Reliability and Compatibility
- Powerful Dedicated +12v Output
£ 37.98 inc. vat
£ 31.65 ex. vat
Thermaltake Litepower 650W PSU
- 80 Plus Efficiency
- Ultra-Quiet Fan
- Cables with High Flexibility
- High-Quality Components
£ 41.99 inc. vat
£ 34.99 ex. vat
Thermaltake Madrid 850W PSU 80+ Gold Certified
- 80 PLUS® Gold certified: with 87-92% efficiency
- 100% High quality Japanese made capacitor
- All flat, low-profile modular cables allow for easy cable routing and...
£ 114.98 inc. vat
£130.98save £16.00£ 95.81 ex. vat
£109.15save £13.340% Interest offers available
Adata XPG CORE REACTOR 750W Modular 80+ Gold PSU
- 750W 80+ Gold
- 4x Molex Connectors
- 12x SATA Connectors
- 4x PCIe Connectors (6+2-Pin)
- Modular Cable System
£ 104.99 inc. vat
£ 87.49 ex. vat
0% Interest offers available
Aerocool Integrator 700W 80+ Certified PSU 12cm Black Fan Active PFC TW Caps UK Cable
- 12cm Silent Fan
- 700w 80+ Efficiency
- Dimensions 150mm x 85mm x 140mm (W x H x D)
£ 44.51 inc. vat
£ 37.09 ex. vat
Aerocool Integrator 500W Power Supply, 80 Plus Bronze - No Mains Cable
- High Efficiency - High efficiency PSU - up to 85% in efficiency...
- Single 12V Rail - Single 12V rail for high compatibility and extreme...
£ 32.98 inc. vat
£34.98save £2.00£ 27.48 ex. vat
£29.15save £1.67
Adata XPG CORE REACTOR 850W Modular 80+ Gold PSU
- 4x Molex Connectors
- 12x SATA Connectors
- 6x PCIe Connectors (6+2-Pin)
- Modular Cable System
- ATX Form Factor
£ 111.99 inc. vat
£ 93.32 ex. vat
0% Interest offers available
Corsair CX Series CX450M 450W 80 Plus Bronze Certified Modular ATX PSU
- 80 Plus Bronze
- Semi Modular PSU
- Sleeved cables Low-Profile All Black
- Supports ATX12V 2.3/2.2/2.01 and EPS12V 2.91 standards
£ 76.62 inc. vat
£ 63.85 ex. vat
CORSAIR CV Series CV450 - 450 Watt Power Supply
- 80 PLUS Bronze Certified
- Full Continuous Power
- Low-Noise Cooling
- Black Sleeving and Casing
- Three-Year Warranty
£ 40.00 inc. vat
£46.48save £6.48£ 33.33 ex. vat
£38.73save £5.40
Antec VP700P Plus Power Supply 80+
- 700W 85% efficiency
- Fully Wired
- Single Rail
- 120mm Fan
£ 49.98 inc. vat
£59.49save £9.51£ 41.65 ex. vat
£49.57save £7.92
Xenta 600W 80+ Power Supply Unit 230V with 12cm Fan
- 600w
- 12cm Low Noise Fan
- 80+ Efficiency
- APFC
- 3-Pin UK AC adaptor Included
£ 34.98 inc. vat
£35.98save £1.00£ 29.15 ex. vat
£29.98save £0.83
Xenta 500W 80+ Power Supply Unit 230V with 12cm Fan
- 500w
- 12cm Low Noise Fan
- 80+ Efficiency
- APFC
- 3-Pin UK AC adaptor Included
£ 31.98 inc. vat
£ 26.65 ex. vat
Aerocool Cylon 600W Fully Wired 80+ PSU/Power Supply
- Fully Wired 80 PLUS White
- Single Rail, 45A
- 120mm Fan
- ATX PSU
£ 37.00 inc. vat
£40.97save £3.97£ 30.83 ex. vat
£34.14save £3.31
Adata XPG CORE REACTOR 650W Modular 80+ Gold PSU
- 650W 80+ Gold
- 4x Molex Connectors
- 12x SATA Connectors
- 4x PCIe Connectors (6+2-Pin)
- Modular Cable System
£ 97.49 inc. vat
£ 81.24 ex. vat
Thermaltake Litepower 450W PSU
- Ultra-Quiet Fan
- Cables with High Flexibility
- High-Quality Components
£ 34.98 inc. vat
£ 29.15 ex. vat
Premium Braided PSU Extension Cable Kit - White & Black
- 24pin
- 6pin
- 4+4pin
- 6+2pin
£ 14.92 inc. vat
£ 12.43 ex. vat
Antec VP600P Plus Power Supply
- 600W Continuous Power
- Up to 88% efficient
- High Current Rails - 2 +12V rails with high load capabilities...
- 120 mm Silence Fans
£ 54.48 inc. vat
£60.27save £5.79£ 45.40 ex. vat
£50.22save £4.82
Antec NE550C GB 80+Bronze Certified PSU
- 550W Continuous Power
- 80 PLUS BRONZE certified
- 3 year warranty
- Whisper-quiet high-quality double ball bearing fan
£ 48.99 inc. vat
£ 40.82 ex. vat
Sponsored
Thermaltake Berlin Pro RGB 650W 80+ Bronze PSU
- 650W 80+ Bronze Rated
- High quality Japanese main capacitor.
- 10 LED Lights including 256 Colors RGB Cycle
- Prepared for the new Intel processors Kabylake
QuickFind: 982575
Mfr part code: W0593RE
£ 62.98 inc. vat
£74.49save £11.51£ 52.48 ex. vat
£62.07save £9.59
CORSAIR CV Series CV550 - 550 Watt Power Supply
- 80 PLUS Bronze Certified
- Full Continuous Power
- Low-Noise Cooling
- Black Sleeving and Casing
- Three-Year Warranty
QuickFind: 951102
Mfr part code: CP-9020210-UK
£ 44.99 inc. vat
£50.00save £5.01£ 37.49 ex. vat
£41.66save £4.17
Aerocool Cylon 500W Power Supply 80 Plus
- 80Plus 230V EU Standard Certified for up to 85%+ efficiency
- Silent 12cm black fan with optimized thermal fan speed control...
QuickFind: 964797
Mfr part code: ACPW-CN50AKC.11
£ 29.98 inc. vat
£36.98save £7.00£ 24.98 ex. vat
£30.81save £5.83
Corsair CXM 750W Semi Modular 80+ Bronze Power Supply
- Black Coloured PSU with a 120mm Silent Cooling Fan
- Equipped with a Single 12v Rail Delivering upto 62 Amps
- Equipped with 2 PCI-E Connectors for Graphics Cards
QuickFind: 429987
Mfr part code: CP-9020061-UK
£ 99.99 inc. vat
£ 83.32 ex. vat
0% Interest offers available
Aerocool Cylon 700w 80+ Psu
- Wattage: 700W
- Non-Modular
- 80 PLUS White
- 120mm Fan
- 2 Year Warranty
QuickFind: 958728
Mfr part code: ACPW-CN70AKC.11
£ 38.99 inc. vat
£42.39save £3.40£ 32.49 ex. vat
£35.32save £2.83
Thermaltake TR2 S Series 700W Power Supply 80 Plus
- Ultra-Quiet 120mm Fan
- Multiple Connectors
- 80 Plus 230V Standard Certified and Kaby Lake-Ready
- High Quality Components
QuickFind: 788083
Mfr part code: PS-TRS-0700NPCWUK-2
£ 64.98 inc. vat
£ 54.15 ex. vat
Thermaltake Litepower 550W PSU
- 550W PSU
- Ultra-Quiet Fan
- Elongated Sleeved Cables
- Utmost Reliability and Compatibility
- Powerful Dedicated +12v Output
QuickFind: 845737
Mfr part code: PS-LTP-0550NPCNUK-2
£ 37.98 inc. vat
£ 31.65 ex. vat
Thermaltake Litepower 650W PSU
- 80 Plus Efficiency
- Ultra-Quiet Fan
- Cables with High Flexibility
- High-Quality Components
QuickFind: 856009
Mfr part code: PS-LTP-0650NPCN UK-2
£ 41.99 inc. vat
£ 34.99 ex. vat
Thermaltake Madrid 850W PSU 80+ Gold Certified
- 80 PLUS® Gold certified: with 87-92% efficiency
- 100% High quality Japanese made capacitor
- All flat, low-profile modular cables allow for easy cable routing and...
QuickFind: 982577
Mfr part code: W0495RE
£ 114.98 inc. vat
£130.98save £16.00£ 95.81 ex. vat
£109.15save £13.340% Interest offers available
Adata XPG CORE REACTOR 750W Modular 80+ Gold PSU
- 750W 80+ Gold
- 4x Molex Connectors
- 12x SATA Connectors
- 4x PCIe Connectors (6+2-Pin)
- Modular Cable System
QuickFind: 990077
Mfr part code: XPG CORE REACTOR 750
£ 104.99 inc. vat
£ 87.49 ex. vat
0% Interest offers available
Aerocool Integrator 700W 80+ Certified PSU 12cm Black Fan Active PFC TW Caps UK Cable
- 12cm Silent Fan
- 700w 80+ Efficiency
- Dimensions 150mm x 85mm x 140mm (W x H x D)
QuickFind: 713439
Mfr part code: ACP-I700HG
£ 44.51 inc. vat
£ 37.09 ex. vat
Aerocool Integrator 500W Power Supply, 80 Plus Bronze - No Mains Cable
- High Efficiency - High efficiency PSU - up to 85% in efficiency...
- Single 12V Rail - Single 12V rail for high compatibility and extreme...
QuickFind: 975188
Mfr part code: ACPB-IT50AXB.12
£ 32.98 inc. vat
£34.98save £2.00£ 27.48 ex. vat
£29.15save £1.67
Adata XPG CORE REACTOR 850W Modular 80+ Gold PSU
- 4x Molex Connectors
- 12x SATA Connectors
- 6x PCIe Connectors (6+2-Pin)
- Modular Cable System
- ATX Form Factor
QuickFind: 990078
Mfr part code: XPG CORE REACTOR 850
£ 111.99 inc. vat
£ 93.32 ex. vat
0% Interest offers available
Corsair CX Series CX450M 450W 80 Plus Bronze Certified Modular ATX PSU
- 80 Plus Bronze
- Semi Modular PSU
- Sleeved cables Low-Profile All Black
- Supports ATX12V 2.3/2.2/2.01 and EPS12V 2.91 standards
QuickFind: 745621
Mfr part code: CP-9020101-UK
£ 76.62 inc. vat
£ 63.85 ex. vat
CORSAIR CV Series CV450 - 450 Watt Power Supply
- 80 PLUS Bronze Certified
- Full Continuous Power
- Low-Noise Cooling
- Black Sleeving and Casing
- Three-Year Warranty
QuickFind: 951101
Mfr part code: CP-9020209-UK
£ 40.00 inc. vat
£46.48save £6.48£ 33.33 ex. vat
£38.73save £5.40
Antec VP700P Plus Power Supply 80+
- 700W 85% efficiency
- Fully Wired
- Single Rail
- 120mm Fan
QuickFind: 982906
Mfr part code: 0-761345-11659-6
£ 49.98 inc. vat
£59.49save £9.51£ 41.65 ex. vat
£49.57save £7.92
Xenta 600W 80+ Power Supply Unit 230V with 12cm Fan
- 600w
- 12cm Low Noise Fan
- 80+ Efficiency
- APFC
- 3-Pin UK AC adaptor Included
QuickFind: 966446
Mfr part code: XEN - 600W
£ 34.98 inc. vat
£35.98save £1.00£ 29.15 ex. vat
£29.98save £0.83
Xenta 500W 80+ Power Supply Unit 230V with 12cm Fan
- 500w
- 12cm Low Noise Fan
- 80+ Efficiency
- APFC
- 3-Pin UK AC adaptor Included
QuickFind: 966445
Mfr part code: XEN-500W
£ 31.98 inc. vat
£ 26.65 ex. vat
Aerocool Cylon 600W Fully Wired 80+ PSU/Power Supply
- Fully Wired 80 PLUS White
- Single Rail, 45A
- 120mm Fan
- ATX PSU
QuickFind: 975187
Mfr part code: ACPW-CN60AKC.11
£ 37.00 inc. vat
£40.97save £3.97£ 30.83 ex. vat
£34.14save £3.31
Adata XPG CORE REACTOR 650W Modular 80+ Gold PSU
- 650W 80+ Gold
- 4x Molex Connectors
- 12x SATA Connectors
- 4x PCIe Connectors (6+2-Pin)
- Modular Cable System
QuickFind: 990076
Mfr part code: XPG CORE REACTOR 650
£ 97.49 inc. vat
£ 81.24 ex. vat
Thermaltake Litepower 450W PSU
- Ultra-Quiet Fan
- Cables with High Flexibility
- High-Quality Components
QuickFind: 856008
Mfr part code: PS-LTP-0450NPCN UK-2
£ 34.98 inc. vat
£ 29.15 ex. vat
Premium Braided PSU Extension Cable Kit - White & Black
- 24pin
- 6pin
- 4+4pin
- 6+2pin
QuickFind: 912965
Mfr part code: PSUWHITEBLK
£ 14.92 inc. vat
£ 12.43 ex. vat
Antec VP600P Plus Power Supply
- 600W Continuous Power
- Up to 88% efficient
- High Current Rails - 2 +12V rails with high load capabilities...
- 120 mm Silence Fans
QuickFind: 958338
Mfr part code: 0-761345-11656-5
£ 54.48 inc. vat
£60.27save £5.79£ 45.40 ex. vat
£50.22save £4.82
Antec NE550C GB 80+Bronze Certified PSU
- 550W Continuous Power
- 80 PLUS BRONZE certified
- 3 year warranty
- Whisper-quiet high-quality double ball bearing fan
QuickFind: 789917
Mfr part code: 0-761345-05553-6
£ 48.99 inc. vat
£ 40.82 ex. vat
Return to top
If your power supply doesn't provide enough power for your system, it can cause serious performance issues or system errors. Whether you're building your own PC, or need to replace a faulty power supply, it's important to work out the type and wattage of the power supply you need.
It's important to check the efficiency rating of your power supply; 80%+ efficiency PSUs are a better option, as they waste less electricity, and don't create as much heat inside your system. You should also consider whether you're looking for a modular or non-modular power supply - this will impact the way you build your system, manage cables, and upgrade in the future.
How do I know which power supply I need for a computer?
Which power supply you should buy depends on the components in your computer, and what you use the system for. Generally speaking, you should aim for a power supply that delivers a wattage at least 40% greater than the wattage used by your hardware combined.
You'll also need to consider the processes you use your computer for - your system will work harder when running more demanding programs or games, and therefore will require more power. As a result, gamers and designers will need more headroom than those who use their computers for social media or admin tasks.
What is the power supply on a computer?
The power supply unit (PSU) in your computer converts alternating current (AC) from your plug socket into a continuous current (DC) to run the hardware in your computer. It's essentially the system that provides electricity to your set up, allowing it to power on. A low quality or under-powered PSU will cause erratic performance, and potentially damage your system.
What voltage is a PC power supply?
The power supply itself doesn't have voltage - it converts voltage from the plug socket into a low voltage direct current (DC). In Europe, this is usually around 220-240 volts, and the DC it is converted to will vary.