It is essential you use the correct power supply for your computer. Whether you are upgrading, building a new set up, or have a broken supply, we have plenty of high-quality, low cost power supplies available at Ebuyer.
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PC Power Supply Units (108 products)
Read more about PC Power Supply Units
Sponsored 
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
£ 44.98 inc. vat
£64.98save £20.00£ 37.48 ex. vat
£54.15save £16.67
Sponsored 
Thermaltake TR2 S 600W PSU
- Ultra-Quiet 120mm Fan
- Multiple Connectors
- 80 Plus 230V Standard Certified and Kaby Lake-Ready
- High Quality Components
£ 37.98 inc. vat
£54.95save £16.97£ 31.65 ex. vat
£45.79save £14.14
Sponsored 
Thermaltake TR2 S Series 500W Power Supply 80 Plus
- Ultra-Quiet 120mm Fan
- Multiple Connectors
- 80 Plus 230V Standard Certified and Kaby Lake-Ready
- High Quality Components
£ 32.98 inc. vat
£48.93save £15.95£ 27.48 ex. vat
£40.77save £13.29
Corsair 650W TX650M Gold Hybid Modular Power Supply/PSU
- 650W Corsair TX-M Series TX650M PSU
- 80PLUS Gold
- Hybrid Modular
- Single Rail
- 51A + 12V, 120mm Fan
£ 76.98 inc. vat
£84.06save £7.08£ 64.15 ex. vat
£70.05save £5.90
Corsair RM650 650 Watt 80+ Gold Fully Modular PSU
- 80+ Gold Certified
- Fully Modular
- 140mm Fan Size
- Multiple GPU Ready
- Zero RPM Fan Mode
£ 82.98 inc. vat
£100.36save £17.38£ 69.15 ex. vat
£83.63save £14.48
Xenta 600W 80+ Power Supply Unit 230V with 12cm Fan
- 600w
- 12cm Low Noise Fan
- 80+ Efficiency
- APFC
- 3-Pin UK AC adaptor Included
£ 25.98 inc. vat
£35.98save £10.00£ 21.65 ex. vat
£29.98save £8.33
Corsair HX850 - 850 Watt Fully Modular PSU
- 80 PLUS® Platinum efficiency
- Zero RPM Fan Mode
- Quiet, efficient operation
- Easy Installation
£ 183.99 inc. vat
£ 153.32 ex. vat
0% Interest offers available
Thermaltake Litepower 550W PSU
- 550W PSU
- Ultra-Quiet Fan
- Elongated Sleeved Cables
- Utmost Reliability and Compatibility
- Powerful Dedicated +12v Output
£ 34.98 inc. vat
£37.98save £3.00£ 29.15 ex. vat
£31.65save £2.50
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
£ 37.98 inc. vat
£44.99save £7.01£ 31.65 ex. vat
£37.49save £5.84
Xenta 500W 80+ Power Supply Unit 230V with 12cm Fan
- 500w
- 12cm Low Noise Fan
- 80+ Efficiency
- APFC
- 3-Pin UK AC adaptor Included
£ 22.98 inc. vat
£31.98save £9.00£ 19.15 ex. vat
£26.65save £7.50
Corsair TX550M 550W 80 Plus Gold Power Supply
- 550W Corsair TX-M Series TX550M PSU
- 80PLUS Gold
- Hybrid Modular, Single Rail
- 43A + 12V, 120mm Fan
- ATX PSU
£ 69.95 inc. vat
£73.56save £3.61£ 58.29 ex. vat
£61.30save £3.01
Corsair RM750x 80+ Gold Fully Modular Power Supply
- 80 Plus Gold Certified
- Low Noise Operation
- Zero RPM Fan Mode
- 100% Japanese 105'c Capacitors
- Fully Modular Cables
£ 115.00 inc. vat
£124.98save £9.98£ 95.83 ex. vat
£104.15save £8.320% Interest offers available
Thermaltake Litepower 450W PSU
- Ultra-Quiet Fan
- Cables with High Flexibility
- High-Quality Components
£ 29.99 inc. vat
£34.98save £4.99£ 24.99 ex. vat
£29.15save £4.16
Corsair 850 Watt RM850x Fully Modular ATX Power Supply
- 80 Plus Gold Certified
- Tuned For Low Noise Operation
- Zero RPM Fan Mode
- 100% All Japanese 105'c Capacitors
- Fully Modular Cables
£ 139.98 inc. vat
£ 116.65 ex. vat
0% Interest offers available
Seasonic Focus GX-750 750W 80+ Gold Modular Power Supply
- High-efficiency thanks to 80 PLUS Gold certification
- Powerful 70A single rail
- Modular cable management with flat cables
- 10 Year manufacturer's guarantee
£ 99.99 inc. vat
£ 83.32 ex. vat
0% Interest offers available
Corsair RMx Series RM550x 80 PLUS Gold Fully Modular ATX PSU
- 80 Plus Gold
- Low Noise Operation
- Fully Modular
- 100% All Japanese 105c Capacitors
- 10 Year Warranty
£ 80.99 inc. vat
£110.00save £29.01£ 67.49 ex. vat
£91.66save £24.17
EVGA 500 BQ Power Supply
- 80 PLUS Bronze
- Hybrid Modular
- SLI/CrossFire Ready
- Single Rail
- 3 Year Warranty
£ 53.26 inc. vat
£ 44.38 ex. vat
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...
£ 26.49 inc. vat
£34.98save £8.49£ 22.07 ex. vat
£29.15save £7.08
Aerocool Cylon 600W Fully Wired 80+ PSU/Power Supply
- Fully Wired 80 PLUS White
- Single Rail, 45A
- 120mm Fan
- ATX PSU
£ 33.40 inc. vat
£40.97save £7.57£ 27.83 ex. vat
£34.14save £6.31
EVGA 750 BQ Power Supply
- Quiet and Intelligent Auto Fan for near-silent operation
- Fan Size / Bearing 140mm Teflon Nano-Steel Bearing
- 5 Year Warranty
£ 74.66 inc. vat
£ 62.21 ex. vat
Corsair CX-F RGB Series 750W 80 Plus Bronze Fully Modular PSU Power Supply - White
- Wattage: 750W
- Fully-Modular
- 80 Plus Bronze
- 120mm RGB Fan
£ 86.99 inc. vat
£ 72.49 ex. vat
Corsair RM750i RMi Series 750 Watt Fully Modular Power Supply Unit 80 Plus Gold Certified
- 80 PLUS Gold certified
- Fully Modular
- Corsair Link monitoring and control
- Dimensions 354 x 288 x 232 (mm)
£ 133.98 inc. vat
£ 111.65 ex. vat
0% Interest offers available
Xenta 400W 80+ Power Supply Unit 230V with 12cm Fan
- 400w
- 12cm Low Noise Fan
- 80+ Efficiency
- APFC
- 3-Pin UK AC adaptor Included
£ 20.99 inc. vat
£28.98save £7.99£ 17.49 ex. vat
£24.15save £6.66
Kolink Modular Power 700W 80 Plus Bronze Modular Power Supply
- 700W 80Plus Bronze
- Semi-modular cable management
- 648W and 54A on a 12V rail
- 80 PLUS bronze certificate for high efficiency
£ 54.95 inc. vat
£ 45.79 ex. vat
Sponsored
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
£ 44.98 inc. vat
£64.98save £20.00£ 37.48 ex. vat
£54.15save £16.67
Sponsored
Thermaltake TR2 S 600W PSU
- Ultra-Quiet 120mm Fan
- Multiple Connectors
- 80 Plus 230V Standard Certified and Kaby Lake-Ready
- High Quality Components
QuickFind: 788082
Mfr part code: PS-TRS-0600NPCWUK-2
£ 37.98 inc. vat
£54.95save £16.97£ 31.65 ex. vat
£45.79save £14.14
Sponsored
Thermaltake TR2 S Series 500W Power Supply 80 Plus
- Ultra-Quiet 120mm Fan
- Multiple Connectors
- 80 Plus 230V Standard Certified and Kaby Lake-Ready
- High Quality Components
QuickFind: 788081
Mfr part code: PS-TRS-0500NPCWUK-2
£ 32.98 inc. vat
£48.93save £15.95£ 27.48 ex. vat
£40.77save £13.29
Corsair 650W TX650M Gold Hybid Modular Power Supply/PSU
- 650W Corsair TX-M Series TX650M PSU
- 80PLUS Gold
- Hybrid Modular
- Single Rail
- 51A + 12V, 120mm Fan
QuickFind: 782057
Mfr part code: CP-9020132-UK
£ 76.98 inc. vat
£84.06save £7.08£ 64.15 ex. vat
£70.05save £5.90
Corsair RM650 650 Watt 80+ Gold Fully Modular PSU
- 80+ Gold Certified
- Fully Modular
- 140mm Fan Size
- Multiple GPU Ready
- Zero RPM Fan Mode
QuickFind: 908646
Mfr part code: CP-9020194-UK
£ 82.98 inc. vat
£100.36save £17.38£ 69.15 ex. vat
£83.63save £14.48
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
£ 25.98 inc. vat
£35.98save £10.00£ 21.65 ex. vat
£29.98save £8.33
Corsair HX850 - 850 Watt Fully Modular PSU
- 80 PLUS® Platinum efficiency
- Zero RPM Fan Mode
- Quiet, efficient operation
- Easy Installation
QuickFind: 788620
Mfr part code: CP-9020138-UK
£ 183.99 inc. vat
£ 153.32 ex. vat
0% Interest offers available
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
£ 34.98 inc. vat
£37.98save £3.00£ 29.15 ex. vat
£31.65save £2.50
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
£ 37.98 inc. vat
£44.99save £7.01£ 31.65 ex. vat
£37.49save £5.84
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
£ 22.98 inc. vat
£31.98save £9.00£ 19.15 ex. vat
£26.65save £7.50
Corsair TX550M 550W 80 Plus Gold Power Supply
- 550W Corsair TX-M Series TX550M PSU
- 80PLUS Gold
- Hybrid Modular, Single Rail
- 43A + 12V, 120mm Fan
- ATX PSU
QuickFind: 782056
Mfr part code: CP-9020133-UK
£ 69.95 inc. vat
£73.56save £3.61£ 58.29 ex. vat
£61.30save £3.01
Corsair RM750x 80+ Gold Fully Modular Power Supply
- 80 Plus Gold Certified
- Low Noise Operation
- Zero RPM Fan Mode
- 100% Japanese 105'c Capacitors
- Fully Modular Cables
QuickFind: 858591
Mfr part code: CP-9020179-UK
£ 115.00 inc. vat
£124.98save £9.98£ 95.83 ex. vat
£104.15save £8.320% Interest offers available
Thermaltake Litepower 450W PSU
- Ultra-Quiet Fan
- Cables with High Flexibility
- High-Quality Components
QuickFind: 856008
Mfr part code: PS-LTP-0450NPCNUK-2
£ 29.99 inc. vat
£34.98save £4.99£ 24.99 ex. vat
£29.15save £4.16
Corsair 850 Watt RM850x Fully Modular ATX Power Supply
- 80 Plus Gold Certified
- Tuned For Low Noise Operation
- Zero RPM Fan Mode
- 100% All Japanese 105'c Capacitors
- Fully Modular Cables
QuickFind: 861268
Mfr part code: CP-9020180-UK
£ 139.98 inc. vat
£ 116.65 ex. vat
0% Interest offers available
Seasonic Focus GX-750 750W 80+ Gold Modular Power Supply
- High-efficiency thanks to 80 PLUS Gold certification
- Powerful 70A single rail
- Modular cable management with flat cables
- 10 Year manufacturer's guarantee
QuickFind: 919254
Mfr part code: FOCUS-GX-750
£ 99.99 inc. vat
£ 83.32 ex. vat
0% Interest offers available
Corsair RMx Series RM550x 80 PLUS Gold Fully Modular ATX PSU
- 80 Plus Gold
- Low Noise Operation
- Fully Modular
- 100% All Japanese 105c Capacitors
- 10 Year Warranty
QuickFind: 856936
Mfr part code: CP-9020177-UK
£ 80.99 inc. vat
£110.00save £29.01£ 67.49 ex. vat
£91.66save £24.17
EVGA 500 BQ Power Supply
- 80 PLUS Bronze
- Hybrid Modular
- SLI/CrossFire Ready
- Single Rail
- 3 Year Warranty
QuickFind: 768921
Mfr part code: 110-BQ-0500-K3
£ 53.26 inc. vat
£ 44.38 ex. vat
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
£ 26.49 inc. vat
£34.98save £8.49£ 22.07 ex. vat
£29.15save £7.08
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
£ 33.40 inc. vat
£40.97save £7.57£ 27.83 ex. vat
£34.14save £6.31
EVGA 750 BQ Power Supply
- Quiet and Intelligent Auto Fan for near-silent operation
- Fan Size / Bearing 140mm Teflon Nano-Steel Bearing
- 5 Year Warranty
QuickFind: 756500
Mfr part code: 110-BQ-0750-V3
£ 74.66 inc. vat
£ 62.21 ex. vat
Corsair CX-F RGB Series 750W 80 Plus Bronze Fully Modular PSU Power Supply - White
- Wattage: 750W
- Fully-Modular
- 80 Plus Bronze
- 120mm RGB Fan
QuickFind: 1125963
Mfr part code: CP-9020227-UK
£ 86.99 inc. vat
£ 72.49 ex. vat
Corsair RM750i RMi Series 750 Watt Fully Modular Power Supply Unit 80 Plus Gold Certified
- 80 PLUS Gold certified
- Fully Modular
- Corsair Link monitoring and control
- Dimensions 354 x 288 x 232 (mm)
QuickFind: 715153
Mfr part code: CP-9020082-UK
£ 133.98 inc. vat
£ 111.65 ex. vat
0% Interest offers available
Xenta 400W 80+ Power Supply Unit 230V with 12cm Fan
- 400w
- 12cm Low Noise Fan
- 80+ Efficiency
- APFC
- 3-Pin UK AC adaptor Included
QuickFind: 966444
Mfr part code: XEN-400W
£ 20.99 inc. vat
£28.98save £7.99£ 17.49 ex. vat
£24.15save £6.66
Kolink Modular Power 700W 80 Plus Bronze Modular Power Supply
- 700W 80Plus Bronze
- Semi-modular cable management
- 648W and 54A on a 12V rail
- 80 PLUS bronze certificate for high efficiency
QuickFind: 1142015
Mfr part code: KL-700MV2
£ 54.95 inc. vat
£ 45.79 ex. vat
Return to top
If your power supply does not provide enough power for your system, it can cause serious performance issues or system errors. Whether you are building your own PC, or need to replace a faulty power supply, it is important to work out the type and wattage of the power supply you need.
It is important to check the efficiency rating of your power supply; 80%+ efficiency PSUs are a better option, as they waste less electricity, and do not create as much heat inside your system. You should also consider whether you are 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 will 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 â€" 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.