96 products found
Semi-passive - Product Filter
     
XFX XTR Series 850W 80 Plus Gold Fully Modular Power Supply

Designed for serious gamers and DIY professionals, the XFX XTR Series 850W Modular 80 Plus Gold power supply delivers...

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XFX XTR Series 850W 80 Plus Gold Fully Modular Power Supply
 

10+ In stock

£127.99

Super Flower Leadex GOLD 850W Fully Modular "80 Plus Gold" ...

Super Flower, one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex GOLD 850W Fully Modular "80 Plus Gold" Power Supply - Black
 

Out of stock

£128.99

(5)
Super Flower Leadex GOLD 750W Fully Modular "80 Plus Gold" ...

Super Flower, one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex GOLD 750W Fully Modular "80 Plus Gold" Power Supply - Black
 

10+ In stock

£106.99

(6)
EVGA SuperNova G2 750W '80 Plus Gold' Modular Power...

The EVGA SuperNOVA 750 G2 has arrived! This power supply is 80 Plus Gold Rated, offers 750W of continuous power,...

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EVGA SuperNova G2 750W '80 Plus Gold' Modular Power Supply
 

10+ In stock

£119.99

(3)
Corsair RM Series RMi 850 '80+ Gold' 850W Modular Powe...

Corsair RMi series power supplies give you extremely tight voltage control, virtually silent operation, and a fully...

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Corsair RM Series RMi 850 '80+ Gold' 850W Modular Power Supply (CP-9020083-UK)
 

10+ In stock

£159.95

EVGA SuperNova G2 850W '80 Plus Gold' Modular Power...

The EVGA SuperNOVA 850 G2 has arrived! This power supply is 80 Plus Gold Rated, offers 850W of continuous power,...

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EVGA SuperNova G2 850W '80 Plus Gold' Modular Power Supply
 

10+ In stock

£137.99

(1)
-14%
Super Flower Leadex Platinum 850W Fully Modular "80 Plus Platinu...

Super Flower, one of the worlds leading power supply manufacturers have unleashed a full Leadex Platinum range, all...

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Super Flower Leadex Platinum 850W Fully Modular "80 Plus Platinum" Power Supply - Black
 

10+ In stock

Was: £139.99 £119.99

Corsair RM Series RM850X '80+ Gold' 850W Modular Power...

Corsair RMx series power supplies give you extremely tight voltage control, quiet operation, Gold-certified...

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Corsair RM Series RM850X '80+ Gold' 850W Modular Power Supply (CP-9020093-UK)
 

3 In stock

£129.95

(1)
Corsair RM Series RMi 1000 '80+ Gold' 1000W Modular Po...

Corsair RMi series power supplies give you extremely tight voltage control, virtually silent operation, and a fully...

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Corsair RM Series RMi 1000 '80+ Gold' 1000W Modular Power Supply (CP-9020084-UK)
 

10+ In stock

£184.99

Corsair HX750i 750W '80 Plus Platinum Digital Modular Power...

HXi Series power supplies give you extremely tight voltage control, virtually silent operation, and a fully modular...

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Corsair HX750i 750W '80 Plus Platinum Digital Modular Power Supply (CP-9020072-UK)
 

4 In stock

£147.95

(3)
 
Super Flower Leadex GOLD 650W Fully Modular "80 Plus Gold" ...

Super Flower, one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex GOLD 650W Fully Modular "80 Plus Gold" Power Supply - Black
 

Out of stock

£95.99

(10)
8Pack Super Flower Leadex Platinum '8 Pack Edition' 2...

The collaboration of Super Flower with the world's number 1 overclocker, the multiple world record holder 'Ian "8...

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Super Flower Leadex Platinum '8 Pack Edition' 2000W Fully Modular "80 Plus Platinum" Power Supply -
 

4 In stock

£379.99

(2)
EVGA SuperNova P2 850W '80 Plus Platinum' Modular P...

The unbeatable performance of the EVGA SuperNOVA P2 power supply line is now available in 850 watts.

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EVGA SuperNova P2 850W '80 Plus Platinum' Modular Power Supply
 

10+ In stock

£149.99

Super Flower Leadex GOLD 550W Fully Modular '80 Plus Gold' ...

Super Flower, one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex GOLD 550W Fully Modular '80 Plus Gold' Power Supply - Black
 

Out of stock

£79.99

Corsair RM Series RM750X '80+ Gold' 750W Modular Power...

Corsair RMx series power supplies give you extremely tight voltage control, quiet operation, Gold-certified...

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Corsair RM Series RM750X '80+ Gold' 750W Modular Power Supply (CP-9020092-UK)
 

10+ In stock

£119.99

 
Super Flower Leadex GOLD 1000W Fully Modular "80 Plus Gold"...

Super Flower, one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex GOLD 1000W Fully Modular "80 Plus Gold" Power Supply - Black
 

Out of stock

£174.95

(3)
-17%
Super Flower Leadex Platinum 650W Fully Modular "80 Plus Platinu...

Super Flower, one of the worlds leading power supply manufacturers have unleashed a full Leadex Platinum range, all...

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Super Flower Leadex Platinum 650W Fully Modular "80 Plus Platinum" Power Supply - Black
 

20+ In stock

Was: £114.95 £94.99

(1)
EVGA SuperNova G2 1000W '80 Plus Gold' Modular Powe...

The EVGA SuperNOVA 1000 G2 has arrived! This power supply is 80 Plus Gold Rated, offers 1000W of continuous power,...

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EVGA SuperNova G2 1000W '80 Plus Gold' Modular Power Supply
 

10+ In stock

£172.99

(5)
Corsair RM Series RM650X '80+ Gold' 650W Modular Power...

Corsair RMx series power supplies give you extremely tight voltage control, quiet operation, Gold-certified...

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Corsair RM Series RM650X '80+ Gold' 650W Modular Power Supply (CP-9020091-UK)
 

10+ In stock

£101.99

Corsair RM Series RM1000X '80+ Gold' 1000W Modular Pow...

Corsair RMx series power supplies give you extremely tight voltage control, quiet operation, Gold-certified...

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Corsair RM Series RM1000X '80+ Gold' 1000W Modular Power Supply (CP-9020094-UK)
 

10+ In stock

£174.95

Corsair HX1200i 1200W '80 Plus Platinum' Digital Modul...

HXi Series power supplies give you extremely tight voltage control, virtually silent operation, and a fully modular...

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Corsair HX1200i 1200W '80 Plus Platinum' Digital Modular Power Supply (CP-9020070-UK)
 

5 In stock

£239.99

Corsair AX860i Digital ATX '80 Plus Platinum' Modular ...

The fully modular Corsair AX860i uses a Digital Signal Processor (DSP) for tighter voltage regulation, which improves...

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Corsair AX860i Digital ATX '80 Plus Platinum' Modular Power Supply (CP-9020037-UK)
 

10+ In stock

£214.99

(3)
EVGA SuperNova P2 1000W '80 Plus Platinum' Modular ...

The EVGA SuperNOVA 1000W Platinum has arrived! This power supply is 80 Plus Platinum Rated, offers 1000W of...

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EVGA SuperNova P2 1000W '80 Plus Platinum' Modular Power Supply (220-P2-1000-X3)
 

10+ In stock

£199.99

(1)
Super Flower Leadex GOLD 1300W Fully Modular "80 Plus Gold"...

Super Flower, one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex GOLD 1300W Fully Modular "80 Plus Gold" Power Supply - Black
 

Out of stock

£184.99

(5)
Corsair HX1000i 1000W '80 Plus Platinum Digital Modular Pow...

HXi Series power supplies give you extremely tight voltage control, virtually silent operation, and a fully modular...

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Corsair HX1000i 1000W '80 Plus Platinum Digital Modular Power Supply (CP-9020074-UK)
 

7 In stock

£214.99

(1)
EVGA SuperNova P2 1200W '80 Plus Platinum' Modular ...

The EVGA SuperNOVA 1200W Platinum has arrived! This power supply is 80 Plus Platinum Rated, offers 1200W of...

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EVGA SuperNova P2 1200W '80 Plus Platinum' Modular Power Supply (220-P2-1200-X3)
 

10+ In stock

£234.95

Super Flower Leadex Platinum 750W Fully Modular "80 Plus Platinu...

Super Flower, one of the worlds leading power supply manufacturers have unleashed a full Leadex Platinum range, all...

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Super Flower Leadex Platinum 750W Fully Modular "80 Plus Platinum" Power Supply - White
 

2 In stock

£128.99

(1)
Corsair HX850i 850W '80 Plus Platinum Digital Modular Power...

HXi Series power supplies give you extremely tight voltage control, virtually silent operation, and a fully modular...

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Corsair HX850i 850W '80 Plus Platinum Digital Modular Power Supply (CP-9020073-UK)
 

7 In stock

£162.95

(2)
 
Super Flower Leadex Platinum 750W Fully Modular "80 Plus Platinu...

Super Flower, one of the worlds leading power supply manufacturers have unleashed a full Leadex Platinum range, all...

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Super Flower Leadex Platinum 750W Fully Modular "80 Plus Platinum" Power Supply - Black
 

4 In stock

£124.99

(1)
Corsair AX1500i Digital ATX 80 Plus Titanium Modular Power Suppl...

If you want the very best power supply on the market, look no further!

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Corsair AX1500i Digital ATX 80 Plus Titanium Modular Power Supply (CP-9020057-UK)
 

4 In stock

£409.99

(2)
EVGA SuperNova G2 1300W '80 Plus Gold' Modular Powe...

This power supply raises the bar with an 80 Plus Gold rating, with 1300W of continuous power, exceptional efficiency...

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EVGA SuperNova G2 1300W '80 Plus Gold' Modular Power Supply (120-G2-1300-X3)
 

9 In stock

£199.99

Corsair RM Series RMi 750 '80+ Gold' 750W Modular Powe...

Corsair RMi series power supplies give you extremely tight voltage control, virtually silent operation, and a fully...

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Corsair RM Series RMi 750 '80+ Gold' 750W Modular Power Supply (CP-9020082-UK)
 

5 In stock

£134.99

Fractal Design Newton R3 1000W 80 Plus Platinum Modular Power Supply

Fractal Design Newton R3 Series power supply units (PSUs) provide clean power efficiently and silently. The Newton R3...

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Fractal Design Newton R3 1000W 80 Plus Platinum Modular Power Supply
 

Out of stock

£149.99

(2)
 
EVGA Supernova P2 750W '80 Plus Platinum' Modular P...

The unbeatable performance of the EVGA SuperNOVA P2 power supply line is now available in 750 watts.

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EVGA Supernova P2 750W '80 Plus Platinum' Modular Power Supply
 

10+ In stock

£132.95

-15%
Super Flower Leadex GOLD 650W Fully Modular "80 Plus Gold" ...

Super Flower, one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex GOLD 650W Fully Modular "80 Plus Gold" Power Supply - White
 

20+ In stock

Was: £98.99 £83.99

EVGA GQ 750W 80 Plus Gold Modular Power Supply - Black

Introducing the latest in the EVGA power supply lineup; the GQ series.

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EVGA GQ 750W 80 Plus Gold Modular Power Supply - Black
 

1 In stock

£91.99

Corsair SF Series 600W 80 Plus Gold Modular SFX Power Supply (CP...

SF Series power supplies bring legendary Corsair performance and reliability to the SFX small form factor standard.

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Corsair SF Series 600W 80 Plus Gold Modular SFX Power Supply (CP-9020105-UK)
 

10+ In stock

£112.99

Corsair RM Series RM550X '80+ Gold' 550W Modular Power...

Corsair RMx series power supplies give you extremely tight voltage control, quiet operation, Gold-certified...

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Corsair RM Series RM550X '80+ Gold' 550W Modular Power Supply (CP-9020090-UK)
 

5 In stock

£93.95

Corsair SF Series 450W 80 Plus Gold Modular SFX Power Supply (CP...

SF Series power supplies bring legendary Corsair performance and reliability to the SFX small form factor standard.

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Corsair SF Series 450W 80 Plus Gold Modular SFX Power Supply (CP-9020104-UK)
 

9 In stock

£86.99

EVGA SuperNova G2 1600W '80 Plus Gold' Modular Powe...

This power supply raises the bar with an 80 Plus Gold rating, with 1600W of continuous power, exceptional efficiency...

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EVGA SuperNova G2 1600W '80 Plus Gold' Modular Power Supply (120-G2-1600-X3)
 

8 In stock

£279.95

(1)
Corsair Professional Series AX 760W '80 Plus Platinum'...

The Corsair Professional Series PLATINUM is built to the highest quality standards with one aim alone: to deliver the...

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Corsair Professional Series AX 760W '80 Plus Platinum' Modular Power Supply (CP-9020045-UK)
 

7 In stock

£174.95

(3)
Super Flower Leadex Platinum 1000W Fully Modular "80 Plus Platin...

Super Flower one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex Platinum 1000W Fully Modular "80 Plus Platinum" Power Supply - Black
 

7 In stock

£189.95

(7)
XFX XTS 1000W 80 Plus Platinum Modular Power Supply - Black

The XFX XTS 1000W PSU is 80 Plus Platinum, Fully Modular and made by Seasonic, a brilliant combination at an...

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XFX XTS 1000W 80 Plus Platinum Modular Power Supply - Black
 

10+ In stock

£157.99

Super Flower Leadex GOLD 550W Fully Modular '80 Plus Gold' ...

Super Flower, one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex GOLD 550W Fully Modular '80 Plus Gold' Power Supply - White
 

7 In stock

£80.99

EVGA GQ 650W 80 Plus Gold Modular Power Supply - Black

Introducing the latest in the EVGA power supply lineup; the GQ series.

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EVGA GQ 650W 80 Plus Gold Modular Power Supply - Black
 

11 In stock

£83.99

Super Flower Leadex GOLD 1000W Fully Modular "80 Plus Gold"...

Super Flower, one of the worlds leading power supply manufacturers is now available at Overclockers UK, with PSU's...

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Super Flower Leadex GOLD 1000W Fully Modular "80 Plus Gold" Power Supply - White
 

7 In stock

£168.95

-11%
Super Flower Leadex GOLD 550W Fully Modular '80 Plus Gold' ...

Super Flower bring a gunmetal coloured power supply into the Leadex range to compliment your system build with a...

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Super Flower Leadex GOLD 550W Fully Modular '80 Plus Gold' Power Supply - Gunmetal
 

20+ In stock

Was: £83.99 £73.99

 
EVGA Supernova GS 850W '80 Plus Gold' Modular Power...

EVGA is launching the new GS PSU series. These power supplies follow the EVGA tradition of uncompromised power and...

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EVGA Supernova GS 850W '80 Plus Gold' Modular Power Supply
 

10+ In stock

£129.95

     
  BUZZ
Seasonic Prime 850W 80 Plus Titanium... Seasonic Prime 850W 80 Plus Titanium Modular Power Supply
Craig Hutcheon Review 16 Sep 2016 Very quiet psu with no problems so far. 10 year warranty is amazing and i can see myself using this psu for the next few builds. Worth the extra money for it. more...
Super Flower Leadex GOLD 750W Fully... Super Flower Leadex GOLD 750W Fully Modular "80 Plus Gold" Power Supply - Black
Ed Review 8 Aug 2016 Superb build quality and no-fuss installation! Very pleased with my purchase and great service from OCUK as usual! more...

Semi-passive Power Supplies

Power Supplies - The heart of every computer. Often overlooked and not given much thought when purchased, the power supply is one of the most important parts of your PC. Overclockers UK know that buying a reliable and good quality PSU is the key to a stable PC, which is why we offer a vast range of units from leading manufacturers such as SuperFlower, Seasonic, Cougar, EVGA, Corsair and be quiet!

Semi-Passive power supplies aim to offer the best of both worlds when it comes to silence and performance. They work by operating in a fanless mode up to a certain wattage load, allowing for completely silent operation. Once the unit hits the specified load (usually around 50%) the fan will spin up to cool the unit, although this is still barely audible. As these units become more efficient, the power supplies can operate at higher and higher loads without requiring the fan, leading to an extremely quiet experience. At OcUK we have a wide range of Semi-passive power supplies available, including the complete SuperFlower Leadex range, and selected EVGA SuperNova units.

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