PC Power Supply Units
When we think of ways to improve our computers performance many of us will overlook the value of the PC power supply unit (PSU). But the power supply unit is a vital piece of equipment that should not be under estimated.
PC Computer Power Supply Units (171)
Read more about PC Computer Power Supply Units
EVGA BR 450W 80+ Bronze Power Supply
- Quiet and Intelligent Auto Fan
- 80 PLUS Bronze certified
- 3 Year Warranty
- Hard Lined Design
- Long Sleeve Bearing Fan
£ 30.00 inc. vat
£ 25.00 ex. vat
Free Delivery*
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
£ 75.48 inc. vat
£83.87save £8.39£ 62.90 ex. vat
£69.89save £6.99
Thermaltake Litepower 550W PSU
- 550W PSU
- Ultra-Quiet Fan
- Elongated Sleeved Cables
- Utmost Reliability and Compatibility
- Powerful Dedicated +12v Output
£ 29.97 inc. vat
£30.29save £0.32£ 24.97 ex. vat
£25.24save £0.27
Corsair VS Series VS550 ATX Power Supply
- 2x Molex Connectors
- 7x SATA Connectors
- 2x PCIe Connectors (6+2-Pin)
- 4 + 4-Pin CPU Power Connector
- ATX Form Factor
£ 38.99 inc. vat
£45.94save £6.95£ 32.49 ex. vat
£38.28save £5.79
Free Delivery*
EVGA 750w G3 80+ Modular Gold
- Unbeatable 10 Year Warranty
- 80 PLUS Gold certified
- Fully Modular
- Hydraulic Dynamic Bearing Fan
£ 109.98 inc. vat
£120.68save £10.70£ 91.65 ex. vat
£100.56save £8.91
Kolink Core Series 500W 80 Plus Certified Power Supply
- Wattage: 500W
- 80 Plus certified
- Quiet 12cm fan cooling
- Active PFC
- 2 Year Warranty
£ 23.96 inc. vat
£ 19.96 ex. vat
Coolermaster Masterwatt Lite V2 400w PSU
- Advanced Circuit Design
- Silent and Durable Fan
- Green Power
- Safety Guardian
- 80 Plus Standard 230v PSU
£ 29.92 inc. vat
£32.73save £2.81£ 24.93 ex. vat
£27.27save £2.34
Free Delivery*
Corsair HX850i 850 Watt Power Supply
- 80 PLUS Platinum efficiency, delivering 92% energy efficiency at real...
- 140mm thermally controlled fluid dynamic bearing fan spins up as...
£ 149.92 inc. vat
£172.72save £22.80£ 124.93 ex. vat
£143.93save £19.00
Free Delivery*
Corsair CX550M Semi-Modular ATX Power Supply
- 80 PLUS Bronze certified
- Modular cable management Semi-Modular
- 120mm thermally controlled fan
- Five year warranty
£ 60.99 inc. vat
£ 50.82 ex. vat
Kolink Core Series 600W 80 Plus Certified Power Supply
- Wattage: 600W
- 80 Plus certified
- Quiet 12cm fan cooling
- Active PFC
- 2 Year Warranty
£ 34.98 inc. vat
£ 29.15 ex. vat
Thermaltake Litepower 450W Power Supply
- 80 Plus Efficiency
- Ultra-Quiet Fan
- Cables with High Flexibility
- High-Quality Components
£ 25.97 inc. vat
£29.99save £4.02£ 21.64 ex. vat
£24.99save £3.35
Kolink Core Series 300W 80 Plus Certified Power Supply
- Wattage: 300W
- 80 Plus certified
- Quiet 12cm fan cooling
- Active PFC
- 2 Year Warranty
£ 19.92 inc. vat
£ 16.60 ex. vat
Free Delivery*
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
£ 50.69 inc. vat
£54.80save £4.11£ 42.24 ex. vat
£45.66save £3.42
Free Delivery*
Thermaltake Smart RGB 700W PSU
- 10 LED Light Bulbs
- 15 Lighting Modes
- Ultra-Quiet 120mm Fan
- 80 Plus Certified
- High Quality Components
£ 57.84 inc. vat
£ 48.20 ex. vat
Free Delivery*
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
£ 79.98 inc. vat
£87.98save £8.00£ 66.65 ex. vat
£73.31save £6.66
Free Delivery*
Corsair SF Series 600 Watt 80 PLUS Gold Certified High Performance SFX PSU
- 600 Watts SF Series
- Fanless mode Yes
- SFX Form Factor
- 80 PLUS Gold certified
- Zero RPM Fan Mode
£ 97.97 inc. vat
£ 81.64 ex. vat
Free Delivery*
EVGA SuperNOVA 650w PSU
- 5 Year Warranty
- 80PLUS Gold Certificate, with up to 90% efficiency
- Highest quality Japanese Capacitors
- Fully Modular to reduce clutter and improve airflow
£ 79.49 inc. vat
£89.10save £9.61£ 66.24 ex. vat
£74.25save £8.01
Free Delivery*
Corsair HX750i 750 Watt Power Supply
- 80 PLUS Platinum efficiency, delivering 92% energy efficiency at real...
- ZeroRPM mode for fan-less operation at low loads and outstanding noise...
£ 137.80 inc. vat
£148.54save £10.74£ 114.83 ex. vat
£123.78save £8.95
Free Delivery*
Corsair RMx Series RM650x 80 PLUS Gold Fully Modular ATX PSU
- 80 Plus Gold
- Low Noise Operation
- Fully Modular
- 100% All Japanese 105c Capacitors
- 10 Year Warranty
£ 87.99 inc. vat
£98.04save £10.05£ 73.32 ex. vat
£81.70save £8.38
Free Delivery*
Corsair HX1000i High Performance Series (1000 Watt) 80 Plus Platinum Atx Power Supply Unit
- ZeroRPM mode for fanless operation at low loads
- 140mm thermally controlled fluid dynamic bearing
- 80 PLUS Platinum efficiency
£ 164.99 inc. vat
£190.86save £25.87£ 137.49 ex. vat
£159.05save £21.56
Free Delivery*
EVGA 650W G2 Fully Modular 80+ PSU
- Single +12V Rail
- LLC Resonant Circuit layout
- Fully Modular
- Double Ball Bearing Fan
- Gold Rated Efficiency
£ 93.69 inc. vat
£104.19save £10.50£ 78.07 ex. vat
£86.82save £8.75
Free Delivery*
Corsair VS Series VS650 650W Power Supply 80 Plus
- 2x Molex Connectors
- 7x SATA Connectors
- 2x PCIe Connectors (6+2-Pin)
- 4 + 4-Pin CPU Power Connector
- ATX Form Factor
£ 50.62 inc. vat
£ 42.18 ex. vat
Free Delivery*
Riotoro Onyx 650W ATX Power Supply
- 80 Plus Bronze Certified
- Semi-Modular
- Flat Cables Reduce Clutter & Airflow
- Thermally Controlled Fan
- 3 Year Warranty
£ 51.00 inc. vat
£ 42.50 ex. vat
Free Delivery*
Corsair 650W CX650 Bronze ATX Power Supply/PSU
- 650W Corsair CX Series CX650
- 80PLUS Bronze
- Fully Wired
- Single Rail
- 54A +12V, 120mm Fan
£ 60.29 inc. vat
£ 50.24 ex. vat
EVGA BR 450W 80+ Bronze Power Supply
- Quiet and Intelligent Auto Fan
- 80 PLUS Bronze certified
- 3 Year Warranty
- Hard Lined Design
- Long Sleeve Bearing Fan
QuickFind: 869760 | Mfr part code: 100-BR-0450-K3
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
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-0550NPCNEU-2
Corsair VS Series VS550 ATX Power Supply
- 2x Molex Connectors
- 7x SATA Connectors
- 2x PCIe Connectors (6+2-Pin)
- 4 + 4-Pin CPU Power Connector
- ATX Form Factor
QuickFind: 834999 | Mfr part code: CP-9020171-UK
EVGA 750w G3 80+ Modular Gold
- Unbeatable 10 Year Warranty
- 80 PLUS Gold certified
- Fully Modular
- Hydraulic Dynamic Bearing Fan
QuickFind: 767601 | Mfr part code: 220-G3-0750-X3
Kolink Core Series 500W 80 Plus Certified Power Supply
- Wattage: 500W
- 80 Plus certified
- Quiet 12cm fan cooling
- Active PFC
- 2 Year Warranty
QuickFind: 864707 | Mfr part code: KL-C500
Coolermaster Masterwatt Lite V2 400w PSU
- Advanced Circuit Design
- Silent and Durable Fan
- Green Power
- Safety Guardian
- 80 Plus Standard 230v PSU
QuickFind: 828324 | Mfr part code: MPX-4001-ACABW-KS
Corsair HX850i 850 Watt Power Supply
- 80 PLUS Platinum efficiency, delivering 92% energy efficiency at real...
- 140mm thermally controlled fluid dynamic bearing fan spins up as...
QuickFind: 659513 | Mfr part code: CP-9020073-UK
Corsair CX550M Semi-Modular ATX Power Supply
- 80 PLUS Bronze certified
- Modular cable management Semi-Modular
- 120mm thermally controlled fan
- Five year warranty
QuickFind: 743020 | Mfr part code: CP-9020102-UK
Kolink Core Series 600W 80 Plus Certified Power Supply
- Wattage: 600W
- 80 Plus certified
- Quiet 12cm fan cooling
- Active PFC
- 2 Year Warranty
QuickFind: 864709 | Mfr part code: KL-C600
Thermaltake Litepower 450W Power Supply
- 80 Plus Efficiency
- Ultra-Quiet Fan
- Cables with High Flexibility
- High-Quality Components
QuickFind: 856008 | Mfr part code: PS-LTP-0450NPCN UK-2
Kolink Core Series 300W 80 Plus Certified Power Supply
- Wattage: 300W
- 80 Plus certified
- Quiet 12cm fan cooling
- Active PFC
- 2 Year Warranty
QuickFind: 864705 | Mfr part code: KL-C300
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
Thermaltake Smart RGB 700W PSU
- 10 LED Light Bulbs
- 15 Lighting Modes
- Ultra-Quiet 120mm Fan
- 80 Plus Certified
- High Quality Components
QuickFind: 855877 | Mfr part code: PS-SPR-0700NHSAWK-1
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
Corsair SF Series 600 Watt 80 PLUS Gold Certified High Performance SFX PSU
- 600 Watts SF Series
- Fanless mode Yes
- SFX Form Factor
- 80 PLUS Gold certified
- Zero RPM Fan Mode
QuickFind: 745622 | Mfr part code: CP-9020105-UK
EVGA SuperNOVA 650w PSU
- 5 Year Warranty
- 80PLUS Gold Certificate, with up to 90% efficiency
- Highest quality Japanese Capacitors
- Fully Modular to reduce clutter and improve airflow
QuickFind: 830658 | Mfr part code: 120-GP-0650-X3
Corsair HX750i 750 Watt Power Supply
- 80 PLUS Platinum efficiency, delivering 92% energy efficiency at real...
- ZeroRPM mode for fan-less operation at low loads and outstanding noise...
QuickFind: 659514 | Mfr part code: CP-9020072-UK
Corsair RMx Series RM650x 80 PLUS Gold Fully Modular ATX PSU
- 80 Plus Gold
- Low Noise Operation
- Fully Modular
- 100% All Japanese 105c Capacitors
- 10 Year Warranty
QuickFind: 856937 | Mfr part code: CP-9020178-UK
Corsair HX1000i High Performance Series (1000 Watt) 80 Plus Platinum Atx Power Supply Unit
- ZeroRPM mode for fanless operation at low loads
- 140mm thermally controlled fluid dynamic bearing
- 80 PLUS Platinum efficiency
QuickFind: 663410 | Mfr part code: CP-9020074-UK
EVGA 650W G2 Fully Modular 80+ PSU
- Single +12V Rail
- LLC Resonant Circuit layout
- Fully Modular
- Double Ball Bearing Fan
- Gold Rated Efficiency
QuickFind: 716706 | Mfr part code: 220-G2-0650-Y3
Corsair VS Series VS650 650W Power Supply 80 Plus
- 2x Molex Connectors
- 7x SATA Connectors
- 2x PCIe Connectors (6+2-Pin)
- 4 + 4-Pin CPU Power Connector
- ATX Form Factor
QuickFind: 835150 | Mfr part code: CP-9020172-UK
Riotoro Onyx 650W ATX Power Supply
- 80 Plus Bronze Certified
- Semi-Modular
- Flat Cables Reduce Clutter & Airflow
- Thermally Controlled Fan
- 3 Year Warranty
QuickFind: 809572 | Mfr part code: PR-BP0650-SM-UK
Corsair 650W CX650 Bronze ATX Power Supply/PSU
- 650W Corsair CX Series CX650
- 80PLUS Bronze
- Fully Wired
- Single Rail
- 54A +12V, 120mm Fan
QuickFind: 782054 | Mfr part code: CP-9020122-UK
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Why You Need A High Quality PSUThe role of a PC power supply unit is to convert the AC electric power that comes from the mains to the DC power that the computer requires. But it can do much more than that. A good quality power supply can make your system more efficient, stable and reliable.
Choosing Your Power SupplyFirstly, ensure you select a PSU from a reputable manufacturer. Here at Ebuyer we have PSUs from Antec, Corsair and Coolermaster amongst other leading names in the tech industry.
OutputWhen choosing a PSU the output is very important. This output is listed as watts and should be greater than the combined wattage of all the components in your system plus 40 to 60%. Very simplistically speaking the more demands you place on your system the higher the wattage of the PC power supply unit should be. For example, a high end gamer will require a far higher wattage than a home user who surfs the net and does some word processing.
Energy EfficiencyBut it isn't all about the wattage. Efficiency is important so look for PSUs that have the 80 Plus certification. This indicates that the PSU will waste less energy than other units making it cheaper to run and much more reliable.
PSU CablingThere are different types of PSU and cabling. Fully modular power supply units enable the user to remove surplus cables from the case, whilst a semi modular PSU has a mix of detachable and hard wired, or permanent, cables.
The third option is a fully wired PSU which, as the name suggests, does not allow any cables to be disconnected. Of the three the fully modular unit is the most versatile.