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 (79 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 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
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 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
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 600W 80+ Certified PSU 12cm Black Fan Active PFC TW Caps UK Cable
- 12cm Silent Fan
- 600w 80+ Efficiency
- Dimensions 150mm x 85mm x 140mm (WxHxD)
£ 36.98 inc. vat
£38.99save £2.01£ 30.81 ex. vat
£32.49save £1.68
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
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
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 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 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
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
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
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
£59.21save £4.73£ 45.40 ex. vat
£49.34save £3.94
Aerocool Integrator 500W Power Supply, 80 Plus Bronze
- Wattage: 500W
- Non-Modular
- 80 PLUS Bronze
- 120mm
- ECO friendly
£ 32.99 inc. vat
£37.72save £4.73£ 27.49 ex. vat
£31.43save £3.94
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
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
Thermaltake Litepower 450W PSU
- Ultra-Quiet Fan
- Cables with High Flexibility
- High-Quality Components
£ 34.98 inc. vat
£ 29.15 ex. vat
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
Aerocool Cylon 400W Fully Wired 80+ PSU/Power Supply
- Fully Wired ATX PSU
- 80PLUS White
- Single Rail
- 30A
- 120mm Fan
£ 29.99 inc. vat
£34.32save £4.33£ 24.99 ex. vat
£28.60save £3.61
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
Aerocool Integrator MX 600W 80 PLUS Silver Semi-Modular PSU Power Supply
- Wattage: 600W
- Semi-Modular
- 80 PLUS Silver
- 120mm Fan
- ECO Friendly
£ 49.85 inc. vat
£ 41.54 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 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
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 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
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 600W 80+ Certified PSU 12cm Black Fan Active PFC TW Caps UK Cable
- 12cm Silent Fan
- 600w 80+ Efficiency
- Dimensions 150mm x 85mm x 140mm (WxHxD)
QuickFind: 713436
Mfr part code: ACP-I600HG
£ 36.98 inc. vat
£38.99save £2.01£ 30.81 ex. vat
£32.49save £1.68
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
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
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 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 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
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
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
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
£59.21save £4.73£ 45.40 ex. vat
£49.34save £3.94
Aerocool Integrator 500W Power Supply, 80 Plus Bronze
- Wattage: 500W
- Non-Modular
- 80 PLUS Bronze
- 120mm
- ECO friendly
QuickFind: 989985
Mfr part code: ACPB-IT50AKC.11
£ 32.99 inc. vat
£37.72save £4.73£ 27.49 ex. vat
£31.43save £3.94
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
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
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
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
Aerocool Cylon 400W Fully Wired 80+ PSU/Power Supply
- Fully Wired ATX PSU
- 80PLUS White
- Single Rail
- 30A
- 120mm Fan
QuickFind: 958727
Mfr part code: ACPW-CN40AKC.11
£ 29.99 inc. vat
£34.32save £4.33£ 24.99 ex. vat
£28.60save £3.61
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
Aerocool Integrator MX 600W 80 PLUS Silver Semi-Modular PSU Power Supply
- Wattage: 600W
- Semi-Modular
- 80 PLUS Silver
- 120mm Fan
- ECO Friendly
QuickFind: 975190
Mfr part code: ACPB-IM60AKC.11
£ 49.85 inc. vat
£ 41.54 ex. vat
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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.