Power Supply Units, or PSUs, are essential for any PC build, delivering consistent and efficient power to your components while protecting against power surges and potential damage. Whether you're building a gaming PC, editing high-resolution content, or setting up a reliable workstation, the right PSU ensures stability and long-term reliability. At ebuyer, we stock a wide range of PSUs from leading brands, available in various wattages, efficiency certifications, and modular designs to suit every build - from entry-level setups to high-performance gaming rigs. Read on for our full PSU buying guide.
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Showing 1 - 25 of 45 results
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- Wattage: 650w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 5 Years
£
44.99
inc.
vat
£ 37.49 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 750w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 5 Years
£
62.55
inc.
vat
£ 52.12 ex.
vat
In Stock- Order now for delivery on Tuesday, 22nd July
- Wattage: 750w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 7 Years
£
84.98
inc.
vat
£ 70.81 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 850w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
£
119.97
inc.
vat
£ 99.97 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 1000w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 7 Years
£
129.94
inc.
vat
£ 108.28 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 1000w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
£
144.94
inc.
vat
£ 120.78 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 600w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
£
29.98
inc.
vat
£ 24.98 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 750w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
£
109.98
inc.
vat
£ 91.65 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 800w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
£
44.98
inc.
vat
£ 37.48 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 750w
- Efficiency: 80 PLUS Bronze
- Cable Type: Modular
- ATX Support: ATX 2.0
- Warranty: 2 Years
£
48.99
inc.
vat
£ 40.82 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 400w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
£
24.99
inc.
vat
£ 20.82 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 1000w
- Efficiency: 80 PLUS Platinum
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
£
179.98
inc.
vat
£ 149.98 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 1200w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
£
174.99
inc.
vat
£ 145.82 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Tuesday, 22nd July
- Wattage: 1000w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
£
175.17
inc.
vat
£ 145.97 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Tuesday, 22nd July
- Wattage: 550w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 5 Years
£
51.17
inc.
vat
£ 42.64 ex.
vat
In Stock- Order now for delivery on Tuesday, 22nd July
£
73.98
inc.
vat
£ 61.65 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 850w
- Efficiency: 80 PLUS Bronze
- Cable Type: Modular
- ATX Support: ATX 2.0
- Warranty: 2 Years
£
54.99
inc.
vat
£ 45.82 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 700w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
£
39.99
inc.
vat
£ 33.32 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 1050w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 2.0
- Warranty: 2 Years
£
96.98
inc.
vat
£ 80.81 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 850w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.0
- Warranty: 2 Years
£
89.99
inc.
vat
£ 74.99 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 850w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.0
- Warranty: 2 Years
£
84.99
inc.
vat
£ 70.82 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 750w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
£
44.25
inc.
vat
£ 36.87 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 650w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
£
39.99
inc.
vat
£ 33.32 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 1000w
- Efficiency: 80 PLUS Platinum
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 7 Years
£
199.98
inc.
vat
£ 166.65 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
- Wattage: 1000w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
£
138.47
inc.
vat
£ 115.39 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
MSI MAG A650BN 650w ATX Power Supply Unit
- Wattage: 650w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 5 Years
SKU: MAG A650BN
£
44.99
inc.
vat
£ 37.49 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
CORSAIR CX750 750w ATX Power Supply Unit
- Wattage: 750w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 5 Years
SKU: CP-9020279-UK
£
62.55
inc.
vat
£ 52.12 ex.
vat
In Stock- Order now for delivery on Tuesday, 22nd July
CORSAIR RM750e 750w ATX Power Supply Unit
- Wattage: 750w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 7 Years
SKU: CP-9020295-UK
£
84.98
inc.
vat
£ 70.81 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
CORSAIR RM850x 850w ATX Power Supply Unit
- Wattage: 850w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
SKU: CP-9020270-UK
£
119.97
inc.
vat
£ 99.97 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
CORSAIR RM1000e 1000w ATX Power Supply Unit
- Wattage: 1000w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 7 Years
SKU: CP-9020297-UK
£
129.94
inc.
vat
£ 108.28 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
CORSAIR RM1000x 1000w ATX Power Supply Unit
- Wattage: 1000w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
SKU: CP-9020271-UK
£
144.94
inc.
vat
£ 120.78 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
CiT FX Pro 600w ATX Power Supply Unit
- Wattage: 600w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
SKU: CIT 600W FX PRO
£
29.98
inc.
vat
£ 24.98 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
CORSAIR RM750x 750w ATX Power Supply Unit
- Wattage: 750w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
SKU: CP-9020285-UK
£
109.98
inc.
vat
£ 91.65 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
GameMax Rampage 800w ATX Power Supply Unit
- Wattage: 800w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
SKU: GMXRPG800
£
44.98
inc.
vat
£ 37.48 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
GameMax Rampage 750w ATX Power Supply Unit
- Wattage: 750w
- Efficiency: 80 PLUS Bronze
- Cable Type: Modular
- ATX Support: ATX 2.0
- Warranty: 2 Years
SKU: GMXRPG750FMOD
£
48.99
inc.
vat
£ 40.82 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
CiT FX Pro 400w ATX Power Supply Unit
- Wattage: 400w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
SKU: FX PRO 400W
£
24.99
inc.
vat
£ 20.82 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
CORSAIR HX1000i 1000w ATX Power Supply Unit
- Wattage: 1000w
- Efficiency: 80 PLUS Platinum
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
SKU: CP-9020259-UK
£
179.98
inc.
vat
£ 149.98 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
CORSAIR RM1200x SHIFT 1200w ATX Power Supply Unit
- Wattage: 1200w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
SKU: CP-9020254-UK
£
174.99
inc.
vat
£ 145.82 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Tuesday, 22nd July
CORSAIR RM1000x SHIFT 1000w ATX Power Supply Unit
- Wattage: 1000w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 10 Years
SKU: CP-9020253-UK
£
175.17
inc.
vat
£ 145.97 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Tuesday, 22nd July
CORSAIR CX550 550w ATX Power Supply Unit
- Wattage: 550w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 5 Years
SKU: CP-9020277-UK
£
51.17
inc.
vat
£ 42.64 ex.
vat
In Stock- Order now for delivery on Tuesday, 22nd July
GameMax GX-850W Pro Modular 80 Plus Gold ATX3.0 PCIe 5.0 White Power Supply With 135mm FDB Fan
SKU: GMX-GX850
£
73.98
inc.
vat
£ 61.65 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
GameMax Rampage 850w ATX Power Supply Unit
- Wattage: 850w
- Efficiency: 80 PLUS Bronze
- Cable Type: Modular
- ATX Support: ATX 2.0
- Warranty: 2 Years
SKU: GMXRPG850FMOD
£
54.99
inc.
vat
£ 45.82 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
GameMax Rampage 700w ATX Power Supply Unit
- Wattage: 700w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
SKU: GMXRPG700
£
39.99
inc.
vat
£ 33.32 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
GameMax RGB-1050 PRO 1050w ATX Power Supply Unit
- Wattage: 1050w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 2.0
- Warranty: 2 Years
SKU: RGB-1050PRO
£
96.98
inc.
vat
£ 80.81 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
GameMax Rampage GX-850 PRO 850w ATX Power Supply Unit - White
- Wattage: 850w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.0
- Warranty: 2 Years
SKU: GMX-GX850PROW
£
89.99
inc.
vat
£ 74.99 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
GameMax Rampage GX-850 PRO 850w ATX Power Supply Unit
- Wattage: 850w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.0
- Warranty: 2 Years
SKU: GMX-GX850PROB
£
84.99
inc.
vat
£ 70.82 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
GameMax GP750 750w ATX Power Supply Unit - White
- Wattage: 750w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
SKU: GP-750-WHT
£
44.25
inc.
vat
£ 36.87 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
GameMax GP650 650w ATX Power Supply Unit
- Wattage: 650w
- Efficiency: 80 PLUS Bronze
- Cable Type: Wired
- ATX Support: ATX 2.0
- Warranty: 2 Years
SKU: GP-650V2
£
39.99
inc.
vat
£ 33.32 ex.
vat
In Stock- Order now for delivery on Saturday, 19th July
CORSAIR SF1000 SFX Power Supply Unit
- Wattage: 1000w
- Efficiency: 80 PLUS Platinum
- Cable Type: Modular
- ATX Support: ATX 3.1
- Warranty: 7 Years
SKU: CP-9020257-UK
£
199.98
inc.
vat
£ 166.65 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
Open Box MSI MPG A1000GS 1000w ATX Power Supply Unit
- Wattage: 1000w
- Efficiency: 80 PLUS Gold
- Cable Type: Modular
- ATX Support: ATX 3.1
SKU: EBR1-MPG A1000GS PCIE5
£
138.47
inc.
vat
£ 115.39 ex.
vat
Finance Options Available
In Stock- Order now for delivery on Saturday, 19th July
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Showing 1 - 25 of 45 results
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Types of Power Supplies
Choosing the right type of PSU is key to building a safe, efficient, and tidy system. Here's a quick overview of your main options:
Modular Power Supplies
Modular PSUs feature fully detachable cables, letting you connect only what you need. This helps improve cable management, airflow, and cooling, making them ideal for high-end builds or anyone who wants a cleaner, more efficient case layout. They tend to cost more, but the upgrade in organisation and thermal performance is worth it for many builders.
Semi-Modular Power Supplies
With some permanently attached cables and others detachable, semi-modular PSUs offer a good balance between affordability and convenience. They're perfect for mid-range or budget-conscious builds that still want to minimise cable clutter.
Non-Modular Power Supplies
All cables are permanently fixed in non-modular PSUs. These are typically the most affordable option but can lead to excess cabling and restricted airflow, which can be problematic in smaller cases or high-performance systems. Best suited for basic or budget builds where space and airflow are less critical.
PSU Efficiency and Certification
What is 80+ Certification?
80+ certification is a standard that indicates how efficiently a PSU converts power from your wall outlet into usable energy for your PC. The less energy wasted as heat, the better your system's efficiency and thermal performance. These are the main certification tiers, listed from entry-level to ultra-efficient:
- 80+ Bronze Certified PSU
- 80+ Silver Certified PSU
- 80+ Gold Certified PSU
- 80+ Platinum Certified PSU
- 80+ Titanium Certified PSU
Choosing the Right Efficiency for Your Needs
Higher-efficiency PSUs reduce your electricity usage and help your system run cooler and quieter - ideal for extending hardware lifespan and reducing noise.
- 80+ Bronze: Suitable for everyday home or office use.
- 80+ Gold or higher: Recommended for gaming PCs, creative workstations, and systems that run for long hours or under heavy load.
PSU Wattage and System Compatibility
Choosing the correct wattage and ensuring compatibility with your PC components is crucial for a stable build. Too little power can cause system crashes, while too much is often unnecessary unless you're future-proofing or overclocking.
Understanding PSU Wattage
PSU wattage refers to how much total power the unit can supply to your system. Your components - particularly your GPU and CPU - will dictate how much you need. Use a trusted PSU calculator to total your system's wattage and choose a PSU that meets or exceeds it. At ebuyer, we stock a multitude of PSUs, ranging from 500W, through 750-900W, all the way to 1000W and above!
How to Match PSU Wattage to Your Build
It's best practice to select a PSU with around 10-20% more wattage than your estimated requirement. This buffer allows for safe performance under peak load, component upgrades, and future expansion - without overpaying for unused power.
Overclocking and PSU Wattage
If you plan to overclock, consider increasing your PSU capacity by 25-40% above your estimated baseline instead. Overclocking significantly increases power draw, and a higher-capacity PSU ensures better thermal and system stability during intensive tasks.
If you're looking to stay up to date with the latest GPUs, such as the NVIDIA 50 Series, you'll likely want to check out an ATX 3.0 or ATX 3.1 PSU. These have a better power connector, maximising efficiency and simplifying cable management.
You might also want to pair your PSU with a UPS (Uninterruptible Power Supply) to protect against power outages and ensure safe shutdowns for home or office setups.
Why Buy from ebuyer?
When you shop for a PSU at ebuyer, you're choosing quality, service, and selection. We offer a broad range of power supply units from trusted names like Corsair, MSI, Endorfy, and more - at competitive prices and with convenient delivery options.
- Fast delivery and finance options
- Secure and safe delivery of PC components