PC Computer Power Supply Units (61 products)

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.

Read more about PC Computer Power Supply Units

Showing 49 - 61 of 61 results
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Be Quiet SFX Power 2 300W Fully Wired 80+ Bronze Power Supply

  • Black Coloured PSU with a 80mm Silent Cooling Fan
  • Equipped with a Dual 12v Rail Delivering upto Amps
  • Equipped with 1 PCI-E Connectors for Graphics Cards

£ 58.07  inc. vat

£ 48.39 ex. vat

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Be Quiet! 850W Modular PSU - Dark Power Pro 11

  • Fluid 135mm SilentWings® 3 Fan
  • Equipped with a Single 12v Rail
  • 80 Plus Platinum
  • Modular Design
  • SLI/XFire Ready

£ 250.98  inc. vat

£ 209.15 ex. vat

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EVGA SuperNOVA 850 T2 Power Supply

  • Advanced Hybrid Cable Management
  • PowerCache
  • Extreme Voltage and Fan Tuning

£ 201.39  inc. vat

£ 167.82 ex. vat

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Corsair CX series CX550 550W 80 PLUS BRONZE

  • 80 PLUS Bronze certified
  • Thermally Controlled Fan
  • Non Modular

£ 59.75  inc. vat

£63.89save £4.14

£ 49.79 ex. vat

£53.24save £3.45
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FSP250-50GUB 250W desktop PSU

£ 39.98  inc. vat

£ 33.31 ex. vat

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Be Quiet TFX Power 2 300W Fully Wired 80+ Bronze Power Supply

  • Black Coloured PSU with a 80mm Silent Cooling Fan
  • Equipped with a Dual 12v Rail Delivering upto Amps
  • Equipped with 8 PCI-E Connectors for Graphics Cards

£ 62.68  inc. vat

£ 52.23 ex. vat

More Info

Corsair RM1000i RMi Series 1000 Watt Fully Modular Power Supply Unit (80 Plus Gold Certified)

  • 80 PLUS Gold certified
  • Fully Modular
  • Corsair Link monitoring and control
  • Dimensions 470 x 405 x 165

£ 182.49  inc. vat

£ 152.07 ex. vat

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Be Quiet! 550W Modular PSU - Dark Power Pro 11

  • Equipped with a Single 12v Rail
  • Quiet SilentWings 3 fan
  • Hybrid Modular Design
  • 80 Plus platinum

£ 157.49  inc. vat

£ 131.24 ex. vat

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Be Quiet! 650W Modular PSU - BN251 Dark Power Pro 11

  • Black Coloured PSU with a 135mm Cooling Fan
  • Equipped with a Single 12v Rail
  • 80 Plus platinum
  • SLI/XFire Ready

£ 145.43  inc. vat

£ 121.19 ex. vat

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Be Quiet! 1000W Modular PSU - Dark Power Pro 11

  • Fluid 135mm SilentWings® 3 Fan
  • Equipped with a Single 12v Rail
  • 80 Plus Platinum
  • Modular Design
  • SLI/XFire Ready

£ 270.00  inc. vat

£ 225.00 ex. vat

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EVGA SuperNOVA 1000 G2 Power Supply

  • 80 PLUS Gold certified
  • Fully Modular to reduce clutter and improve airflow
  • NVIDIA SLI & AMD Crossfire Ready
  • Unbeatable 10 Year Warranty

£ 151.65  inc. vat

£ 126.37 ex. vat

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Thermaltake Toughpower GF1 650 Watt Full Modular 80+ Gold ARGB PSU/Power Supply

  • 650 W 80 PLUS Gold
  • 150 x 86 x 160 (WxHxD)
  • 1 x 140mm w/ Addressable RGB LEDs

£ 126.48  inc. vat

£ 105.40 ex. vat

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Seasonic Focus PX-550 550W 80+ Platinum Modular Power Supply

  • High-efficiency thanks to 80 PLUS Platinum certification
  • Powerful 45A single rail
  • Modular cable management with flat cables
  • 10 Year manufacturer's guarantee

£ 116.49  inc. vat

£ 97.07 ex. vat

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Be Quiet SFX Power 2 300W Fully Wired 80+ Bronze Power Supply

  • Black Coloured PSU with a 80mm Silent Cooling Fan
  • Equipped with a Dual 12v Rail Delivering upto Amps
  • Equipped with 1 PCI-E Connectors for Graphics Cards

QuickFind: 620499

Mfr part code: BN226

£ 58.07  inc. vat

£ 48.39 ex. vat

More Info

Be Quiet! 850W Modular PSU - Dark Power Pro 11

  • Fluid 135mm SilentWings® 3 Fan
  • Equipped with a Single 12v Rail
  • 80 Plus Platinum
  • Modular Design
  • SLI/XFire Ready

QuickFind: 728220

Mfr part code: BN253

£ 250.98  inc. vat

£ 209.15 ex. vat

More Info

EVGA SuperNOVA 850 T2 Power Supply

  • Advanced Hybrid Cable Management
  • PowerCache
  • Extreme Voltage and Fan Tuning

QuickFind: 759093

Mfr part code: 220-T2-0850-X3

£ 201.39  inc. vat

£ 167.82 ex. vat

More Info

Corsair CX series CX550 550W 80 PLUS BRONZE

  • 80 PLUS Bronze certified
  • Thermally Controlled Fan
  • Non Modular

QuickFind: 782046

Mfr part code: CP-9020121-UK

£ 59.75  inc. vat

£63.89save £4.14

£ 49.79 ex. vat

£53.24save £3.45
More Info

FSP250-50GUB 250W desktop PSU

QuickFind: 973093

Mfr part code: FSP250-50GUB

£ 39.98  inc. vat

£ 33.31 ex. vat

More Info

Be Quiet TFX Power 2 300W Fully Wired 80+ Bronze Power Supply

  • Black Coloured PSU with a 80mm Silent Cooling Fan
  • Equipped with a Dual 12v Rail Delivering upto Amps
  • Equipped with 8 PCI-E Connectors for Graphics Cards

QuickFind: 620502

Mfr part code: BN228

£ 62.68  inc. vat

£ 52.23 ex. vat

More Info

Corsair RM1000i RMi Series 1000 Watt Fully Modular Power Supply Unit (80 Plus Gold Certified)

  • 80 PLUS Gold certified
  • Fully Modular
  • Corsair Link monitoring and control
  • Dimensions 470 x 405 x 165

QuickFind: 715155

Mfr part code: CP-9020084-UK

£ 182.49  inc. vat

£ 152.07 ex. vat

More Info

Be Quiet! 550W Modular PSU - Dark Power Pro 11

  • Equipped with a Single 12v Rail
  • Quiet SilentWings 3 fan
  • Hybrid Modular Design
  • 80 Plus platinum

QuickFind: 728215

Mfr part code: BN250

£ 157.49  inc. vat

£ 131.24 ex. vat

More Info

Be Quiet! 650W Modular PSU - BN251 Dark Power Pro 11

  • Black Coloured PSU with a 135mm Cooling Fan
  • Equipped with a Single 12v Rail
  • 80 Plus platinum
  • SLI/XFire Ready

QuickFind: 728218

Mfr part code: BN251

£ 145.43  inc. vat

£ 121.19 ex. vat

More Info

Be Quiet! 1000W Modular PSU - Dark Power Pro 11

  • Fluid 135mm SilentWings® 3 Fan
  • Equipped with a Single 12v Rail
  • 80 Plus Platinum
  • Modular Design
  • SLI/XFire Ready

QuickFind: 728222

Mfr part code: BN254

£ 270.00  inc. vat

£ 225.00 ex. vat

More Info

EVGA SuperNOVA 1000 G2 Power Supply

  • 80 PLUS Gold certified
  • Fully Modular to reduce clutter and improve airflow
  • NVIDIA SLI & AMD Crossfire Ready
  • Unbeatable 10 Year Warranty

QuickFind: 759092

Mfr part code: 120-G2-1000-X3

£ 151.65  inc. vat

£ 126.37 ex. vat

More Info

Thermaltake Toughpower GF1 650 Watt Full Modular 80+ Gold ARGB PSU/Power Supply

  • 650 W 80 PLUS Gold
  • 150 x 86 x 160 (WxHxD)
  • 1 x 140mm w/ Addressable RGB LEDs

QuickFind: 913932

Mfr part code: PS-TPD-0650F3FAGE-1

£ 126.48  inc. vat

£ 105.40 ex. vat

More Info

Seasonic Focus PX-550 550W 80+ Platinum Modular Power Supply

  • High-efficiency thanks to 80 PLUS Platinum certification
  • Powerful 45A single rail
  • Modular cable management with flat cables
  • 10 Year manufacturer's guarantee

QuickFind: 919252

Mfr part code: FOCUS-PX-550

£ 116.49  inc. vat

£ 97.07 ex. vat

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Showing 49 - 61 of 61 results
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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.