177 products found
Processors - Product Filter
     
Intel Core i7-6700K 4.0GHz (Skylake) Socket LGA1151 Processor - Retail

Quad Core with Hyperthreading Technology, 4.00GHz clock speed, 14nm Process, 8MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Iris DX12 Graphics, 3 Year Warranty

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Intel Core i7-6700K 4.0GHz (Skylake) Socket LGA1151 Processor - Retail
 

10+ In stock

£319.99

(4)
Intel Core i5-6600K 3.9GHz (Skylake) Socket LGA1151 Processor - Retail

Quad Core Technology, 3.50GHz clock speed, 14nm Process, 6MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Iris DX12 Graphics, 3 Year Warranty

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Intel Core i5-6600K 3.9GHz (Skylake) Socket LGA1151 Processor - Retail
 

10+ In stock

£229.99

(3)
-6%
Intel Core i7-6700K 4.0GHz (Skylake) Socket LGA1151 Processor - OEM

Quad Core with Hyperthreading Technology, 4.00GHz clock speed, 14nm Process, 8MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Iris DX12 Graphics, 1 Year Warranty

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Intel Core i7-6700K 4.0GHz (Skylake) Socket LGA1151 Processor - OEM
 

10+ In stock

Was: £319.99 £299.99

(2)
Arctic Silver 5 Thermal Compound (3.5g)

Arctic Silver 5 uses three unique shapes and sizes of 99.9% pure silver particles to maximize particle-to-particle contact area and thermal transfer.

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Arctic Silver 5 Thermal Compound (3.5g)
 

100+ In stock

£5.99

(21)
-6%
Intel Core i5-6600K 3.9GHz (Skylake) Socket LGA1151 Processor - OEM

Quad Core Technology, 3.50GHz clock speed, 14nm Process, 6MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Iris DX12 Graphics, 1 Year Warranty

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Intel Core i5-6600K 3.9GHz (Skylake) Socket LGA1151 Processor - OEM
 

10+ In stock

Was: £224.99 £209.99

-2%
Intel i7-5820K 3.30GHz (Haswell-E) Socket LGA2011-V3 Processor - OEM (CM8064801548435)

Six Core Technology, 3.30GHz clock speed, 15MB L3 Cache, Hyper-Threading Technology, Quad Channel DDR4 Controller, 1 Yr Warranty.

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Intel i7-5820K 3.30GHz (Haswell-E) Socket LGA2011-V3 Processor - OEM (CM8064801548435)
 

10+ In stock

Was: £359.99 £349.99

Intel Core i7-4790K 4.00GHz (Devil's Canyon) Socket LGA1150 Processor - Retail

Quad Core with Hyperthreading Technology, 4.00GHz clock speed, 22nm Process, 8MB L3 Cache, Dual Channel DDR3 Controller, Integrated HD 4600 Graphics, 3 Year Warranty

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Intel Core i7-4790K 4.00GHz (Devil's Canyon) Socket LGA1150 Processor - Retail
 

10+ In stock

£319.99

(15)
Intel Core i5-6400 2.70GHz (Skylake) Socket LGA1151 Processor - Retail

Quad Core Technology, 2.70GHz clock speed, 14nm Process, 6MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Iris DX12 Graphics, 3 Year Warranty

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Intel Core i5-6400 2.70GHz (Skylake) Socket LGA1151 Processor - Retail
 

10+ In stock

£179.99

Intel Core i5-6500 3.20GHz (Skylake) Socket LGA1151 Processor - Retail

Quad Core Technology, 3.20GHz clock speed, 14nm Process, 6MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Iris DX12 Graphics, 3 Year Warranty

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Intel Core i5-6500 3.20GHz (Skylake) Socket LGA1151 Processor - Retail
 

10+ In stock

£188.99

 
Thermal Grizzly Kryonaut High Performance Thermal Paste - 1 Gramm

Thermal Grizzly Kryonaut Thermal Paste was specially developed for extremely demanding applications and the most demanding of Overlocking community

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Thermal Grizzly Kryonaut High Performance Thermal Paste - 1 Gramm
 

100+ In stock

£4.99

 
Intel i7-5820K 3.30GHz (Haswell-E) Socket LGA2011-V3 Processor - Retail (BX80648I75820K)

Six Core Technology, 3.30GHz clock speed, 15MB L3 Cache, Hyper-Threading Technology, Quad Channel DDR4 Controller, 3 Yr Warranty.

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Intel i7-5820K 3.30GHz (Haswell-E) Socket LGA2011-V3 Processor - Retail (BX80648I75820K)
 

10+ In stock

£368.99

(5)
 
8Pack Approved - Intel Core i5 6400 @ 4.4GHz Overclocked Quad Core Gaming Bundle

Bundle Includes: Intel Core i5-6400 @ 4.40GHz, Asus Z170-E ATX Motherboard, Up to 16GB DDR4 2666MHz Memory, A choice of high-performance air or liquid coolers.

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8Pack Approved - Intel Core i5 6400 @ 4.4GHz Overclocked Quad Core Gaming Bundle
Free shipping 3
 

10+ In stock

£401.92

(5)
 
Free Items AMD Piledriver FX-8 Eight Core 8350 Black Edition 4.00GHz (Socket AM3+) Processor - Retail

Eight Core Technology, Unlocked Multiplier, 4.00GHz Clock Speed, 8MB L2 Cache, 8MB L3 Cache, 64-Bit Technology, HyperTransport 3.0 Technology, 3 Year Warranty.

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AMD Piledriver FX-8 Eight Core 8350 Black Edition 4.00GHz (Socket AM3+) Processor - Retail
 

10+ In stock

£139.99

(33)
Intel Core i5-4690K 3.50GHz (Devil's Canyon) Socket LGA1150 Processor - Retail

Quad Core Technology, 3.50GHz clock speed, 22nm Process, 6MB L3 Cache, Dual Channel DDR3 Controller, Integrated HD 4600 Graphics, 3 Year Warranty

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Intel Core i5-4690K 3.50GHz (Devil's Canyon) Socket LGA1150 Processor - Retail
 

10+ In stock

£218.99

(9)
Intel Core i3-6100 3.70GHz (Skylake) Socket LGA1151 Processor - Retail

Dual Core Technology, 3.70GHz clock speed, 14nm Process, 3MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Iris DX12 Graphics, 3 Year Warranty

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Intel Core i3-6100 3.70GHz (Skylake) Socket LGA1151 Processor - Retail
 

10+ In stock

£109.99

(1)
-44%
Arctic Cooling Arctic MX-4 Thermal Compound (4g)

With its competitive pricing, the performance of the ARCTIC MX-4 is the best thermal paste on the market by far.

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Arctic MX-4 Thermal Compound (4g)
 

72 In stock

Was: £8.99 £4.99

(8)
Intel Core i5-6600 3.30GHz (Skylake) Socket LGA1151 Processor - Retail

Quad Core Technology, 3.30GHz clock speed, 14nm Process, 6MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Iris DX12 Graphics, 3 Year Warranty

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Intel Core i5-6600 3.30GHz (Skylake) Socket LGA1151 Processor - Retail
 

10+ In stock

£209.99

Free Items AMD Piledriver FX-6 Six Core 6300 Black Edition 3.50GHz (Socket AM3+) Processor - Retail

Six Core Technology, Unlocked Multiplier, 3.50GHz Clock Speed, 6MB L2 Cache, 8MB L3 Cache, 64-Bit Technology, HyperTransport 3.0 Technology, 3 Year Warranty.

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AMD Piledriver FX-6 Six Core 6300 Black Edition 3.50GHz (Socket AM3+) Processor - Retail
 

20+ In stock

£89.99

(16)
Intel Core i5-4690 3.50GHz (Haswell) Socket LGA1150 Processor - Retail

Quad Core Technology, 3.50GHz clock speed, 22nm Process, 6MB L3 Cache, Dual Channel DDR3 Controller, Integrated HD 4600 Graphics, 3 Year Warranty

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Intel Core i5-4690 3.50GHz (Haswell) Socket LGA1150 Processor - Retail
 

10+ In stock

£199.99

(2)
Intel Pentium K Anniversary G3258 Socket LGA1150 Processor - Retail

Dual Core Technology, 3.20GHz clock speed, 22nm Process, 3MB L3 Cache, Dual Channel DDR3 Controller, Integrated HD Graphics, UNLOCKED, 3 Year Warranty

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Intel Pentium K Anniversary G3258 Socket LGA1150 Processor - Retail
 

20+ In stock

£62.99

(10)
AMD Piledriver FX-4 Quad Core 4300 3.80GHz (Socket AM3+) Processor - Retail

Quad Core Technology, Unlocked Multiplier, 3.80GHz Clock Speed, 6MB L2 Cache, 8MB L3 Cache, 64-Bit Technology, HyperTransport 3.0 Technology, 3 Year Warranty.

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AMD Piledriver FX-4 Quad Core 4300 3.80GHz (Socket AM3+) Processor - Retail
 

17 In stock

£64.99

(6)
Gigabyte Z170X Gaming 7 - Skylake Core i7 6700K CPU & Motherboard Bundle **£20 Saving**

Intel Core i7-6700K Skylake Socket LGA1151 Processor + Gigabyte Z170X-Gaming 7 Intel Z170 (Socket 1151) DDR4 ATX Motherboard are a great pairing for a new Gaming PC at a low low price!

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Gigabyte Z170X Gaming 7 - Skylake Core i7 6700K CPU & Motherboard Bundle **£20 Saving**
 

Out of stock

Was: £490.98 £489.94

(1)
Intel Core i7-6700 3.40GHz (Skylake) Socket LGA1151 Processor - Retail

Quad Core with Hyperthreading Technology, 3.40GHz clock speed, 14nm Process, 8MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Iris DX12 Graphics, 3 Year Warranty

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Intel Core i7-6700 3.40GHz (Skylake) Socket LGA1151 Processor - Retail
 

10+ In stock

£282.98

(2)
-5%
Free Items AMD Piledriver FX-8 Eight Core 9590 Blk Ed 4.70GHz (5.00GHz Turbo) (Socket AM3+) Processor - Retail

Eight Core Technology, Unlocked Multiplier, 4.70GHz Clock Speed, 8MB L2 Cache, 8MB L3 Cache, 64-Bit Technology, HyperTransport 3.0 Technology, 1 Year Warranty

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AMD Piledriver FX-8 Eight Core 9590 Blk Ed 4.70GHz (5.00GHz Turbo) (Socket AM3+) Processor - Retail
 

10+ In stock

Was: £179.99 £169.99

(10)
Intel i7-6800K 3.40GHz (Broadwell-E) Socket LGA2011-V3 Processor - Retail (BX80671I76800K)

3.4GHz base frequency, 3.8GHz Max Turbo Frequency, 6 Cores, 12 Threads, 15MB Cache, 28 PCI-E Lanes

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Intel i7-6800K 3.40GHz (Broadwell-E) Socket LGA2011-V3 Processor - Retail (BX80671I76800K)
 

10+ In stock

£409.99

 
8Pack Approved - Elite Tier SkyLake Bundle: Intel i7-6700K OEM @ 4.50GHz

Bundle Includes: Intel Core i7-6700K OEM @ 4.50GHz, Asus Z170 Maximum VIII Hero, Corsair Vengeance LPX 16GB DDR4 2666MHz, OcUK Techlabs Extreme 240mm Hydro CPU Cooler

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8Pack Approved - Elite Tier SkyLake Bundle: Intel i7-6700K OEM @ 4.50GHz
Free shipping 3
 

10+ In stock

Was: £759.92 £680.80

(6)
-7%
Asus Z170 Maximus VIII Hero - Skylake Core i7 6700K CPU & Motherboard Bundle **£20 Saving**

Intel Core i7-6700K Skylake Socket LGA1151 Processor + Asus Maximus VIII Hero Intel Z170 (Socket 1151) DDR4 ATX Motherboard are a great pairing for a new Gaming PC at a low low price!

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Asus Z170 Maximus VIII Hero - Skylake Core i7 6700K CPU & Motherboard Bundle **£20 Saving**
 

10+ In stock

Was: £526.98 £487.98

 
Intel i7-5930K 3.50GHz (Haswell-E) Socket LGA2011-V3 Processor - Retail (BX80648I75930K)

Six Core Technology, 3.50GHz clock speed, 15MB L3 Cache, Hyper-Threading Technology, Quad Channel DDR4 Controller, 3 Yr Warranty.

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Intel i7-5930K 3.50GHz (Haswell-E) Socket LGA2011-V3 Processor - Retail (BX80648I75930K)
 

5 In stock

£575.99

(2)
 
Gigabyte Z170XP-SLI - Intel Core i5 6600K Bundle **£20 Saving**

Intel Core i5-6600K 3.90GHz (Skylake) Socket LGA1151 Processor + Gigabyte Z170XP-SLI Intel Z97 (Socket 1151) DDR4 ATX Motherboard are a great pairing for a new Gaming PC at a low low price!

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Gigabyte Z170XP-SLI - Intel Core i5 6600K Bundle **£20 Saving**
 

1 In stock

£334.98

(2)
-5%
Intel i7-5930K 3.50GHz (Haswell-E) Socket LGA2011-V3 Processor - OEM (CM8064801548338)

Six Core Technology, 3.50GHz clock speed, 15MB L3 Cache, Hyper-Threading Technology, Quad Channel DDR4 Controller, 1 Yr Warranty.

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Intel i7-5930K 3.50GHz (Haswell-E) Socket LGA2011-V3 Processor - OEM (CM8064801548338)
 

2 In stock

Was: £569.99 £539.99

Thermal Grizzly Kryonaut High Performance Thermal Paste - 5.5g / 1.5 ml

Thermal Grizzly Kryonaut Thermal Paste was specially developed for extremely demanding applications and the most demanding of Overlocking community

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Thermal Grizzly Kryonaut High Performance Thermal Paste - 5.5g / 1.5 ml
 

50+ In stock

£12.95

(2)
Intel Core i5-4460 3.20GHz (Haswell) Socket LGA1150 Processor - Retail

Quad Core Technology, 3.20GHz clock speed, 22nm Process, 6MB L3 Cache, Dual Channel DDR3 Controller, Integrated HD 4600 Graphics, 3 Year Warranty

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Intel Core i5-4460 3.20GHz (Haswell) Socket LGA1150 Processor - Retail
 

10+ In stock

£169.99

Arctic Silver Alumina Thermal Adhesive (5g)

Arctic Alumina Thermal Adhesive is a two part permanent adhesive for thermal joints in minimum bond line applications. It is NOT intended to be used between a CPU and the CPU heatsink.

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Arctic Silver Alumina Thermal Adhesive (5g)
 

51 In stock

£5.99

Free Items AMD Piledriver FX-8 Eight Core 8320 Black Edition 3.50GHz (Socket AM3+) Processor - Retail

Eight Core Technology, Unlocked Multiplier, 3.50GHz Clock Speed, 8MB L2 Cache, 8MB L3 Cache, 64-Bit Technology, HyperTransport 3.0 Technology, 3 Year Warranty.

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AMD Piledriver FX-8 Eight Core 8320 Black Edition 3.50GHz (Socket AM3+) Processor - Retail
 

10+ In stock

£129.95

(10)
Intel i7-6950X Extreme 3.00GHz (Broadwell-E) Socket LGA2011-V3 Processor - Retail (BX80671I76950X)

3GHz base frequency, 4GHz Max Turbo Frequency, 10 Cores, 20 Threads, 25MB Cache, 40 PCI-E Lanes

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Intel i7-6950X Extreme 3.00GHz (Broadwell-E) Socket LGA2011-V3 Processor - Retail (BX80671I76950X)
 

9 In stock

£1,523.99

(2)
Thermal Grizzly Kryonaut High Performance Thermal Paste - 11.1g / 3 ml

Thermal Grizzly Kryonaut Thermal Paste was specially developed for extremely demanding applications and the most demanding of Overlocking community

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Thermal Grizzly Kryonaut High Performance Thermal Paste - 11.1g / 3 ml
 

43 In stock

£18.95

(6)
-1%
Gigabyte Z170-Gaming K3 - Intel Core i5 6600K Bundle **£10 Saving**

Intel Core i5-6600K 3.90GHz (Skylake) Socket LGA1151 Processor + Gigabyte Z170-Gaming K3 Intel Z170 (Socket 1151) DDR4 ATX Motherboard are a great pairing for a new Gaming PC at a low low price!

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Gigabyte Z170-Gaming K3 - Intel Core i5 6600K Bundle **£10 Saving**
 

Out of stock

Was: £329.94 £324.98

(1)
Free Items AMD Piledriver FX-6 Six Core 6350 Black Edition 3.90GHz (Socket AM3+) Processor - Retail

Six Core Technology, Unlocked Multiplier, 3.90GHz Clock Speed, 6MB L2 Cache, 8MB L3 Cache, 64-Bit Technology, HyperTransport 3.0 Technology, 3 Year Warranty.

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AMD Piledriver FX-6 Six Core 6350 Black Edition 3.90GHz (Socket AM3+) Processor - Retail
 

8 In stock

£109.99

(2)
Intel i7-6850K 3.60GHz (Broadwell-E) Socket LGA2011-V3 Processor - Retail (BX80671I76850K)

3.6GHz base frequency, 4GHz Max Turbo Frequency, 6 Cores, 12 Threads, 15MB Cache, 40 PCI-E Lanes

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Intel i7-6850K 3.60GHz (Broadwell-E) Socket LGA2011-V3 Processor - Retail (BX80671I76850K)
 

10+ In stock

£559.99

AMD Athlon X4 860K Black Edition 3.70GHz (Socket FM2+) Kaveri Quad Core Processor (AD860KXBJABOX)

True Quad-Core Technology, 3.70GHz clock speed, 4MB L2 Cache, DDR3-1866 support, AMD Cool & Quiet v3.0, 3 Year Warranty.

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AMD Athlon X4 860K Black Edition 3.70GHz (Socket FM2+) Kaveri Quad Core Processor (AD860KXBJABOX)
 

11 In stock

£65.99

(2)
AMD Kaveri A10-7870K 12 Compute Core APU w/ Radeon R7 Graphics (4 CPU + 8 GPU Compute Cores) - Reta

Integrated R7 Graphics, Quad-Core Technology, 3.90GHz Clock Speed, 866MHz GPU Clock Speed, 4MB L2 Cache, 512 Radeon Cores, DDR3-2400 Support, 95W TDP, 3 Year Warranty.

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AMD Kaveri A10-7870K 12 Compute Core APU w/ Radeon R7 Graphics (4 CPU + 8 GPU Compute Cores) - Reta
 

9 In stock

£119.99

AMD Kaveri A8-7650K 10 Compute Core APU w/ Radeon R7 Graphics (4 CPU + 6 GPU Compute Cores) - Retail

Integrated R7 Graphics, Quad-Core Technology, 3.30GHz Clock Speed, 720MHz GPU Clock Speed, 4MB L2 Cache, 384 Radeon Cores, DDR3-2133 Support, 95W TDP, 3 Year Warranty.

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AMD Kaveri A8-7650K 10 Compute Core APU w/ Radeon R7 Graphics (4 CPU + 6 GPU Compute Cores) - Retail
 

8 In stock

£74.99

AMD A6-6400K 3.90GHz (Socket FM2) APU Richland Dual Core Processor (AD640KOKHLBOX)

Integrated HD 8470D Graphics, Dual-Core Technology, 3.90GHz Clock Speed, 800MHz GPU Clock Speed, 1MB L2 Cache, 192 Radeon Cores, DDR3-2400 Support, 65W TDP, 3 Year Warranty.

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AMD A6-6400K 3.90GHz (Socket FM2) APU Richland Dual Core Processor (AD640KOKHLBOX)
 

2 In stock

£43.99

(2)
Intel Pentium Dual Core G4400 3.30GHz (Skylake) Socket LGA1151 Processor - Retail

Dual Core Technology, 3.30GHz clock speed, 14nm Process, 3MB L3 Cache, Dual Channel DDR3/DDR4 Controller, Integrated Graphics, 3 Year Warranty

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Intel Pentium Dual Core G4400 3.30GHz (Skylake) Socket LGA1151 Processor - Retail
 

13 In stock

£53.99

Arctic Silver 5 Thermal Compound (12g)

Arctic Silver 5 uses three unique shapes and sizes of 99.9% pure silver particles to maximize particle-to-particle contact area and thermal transfer.

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Arctic Silver 5 Thermal Compound (12g)
 

Out of stock

£15.95

-9%
Gigabyte 990X-Gaming SLI - AMD Piledriver FX-6 6300 6 Core - 8GB DDR3 Memory Bundle **£20 Saving**

AMD FX-6 6300 3.5GHz (4.1GHz Turbo), Gigabyte 990X Gaming SLI Motherboard, 8GB (2x4GB) DDR3 1600MHz Memory

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Gigabyte 990X-Gaming SLI - AMD Piledriver FX-6 6300 6 Core - 8GB DDR3 Memory Bundle **£20 Saving**
 

10+ In stock

Was: £211.97 £191.96

(1)
Gigabyte X99-SLI - Intel Core i7 6800K Six Core CPU & Motherboard Bundle ***£20 Saving***

Overclockers UK are offering you the opportunity to pick up a perfectly matched motherboard and CPU pairing at a discounted price.

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Gigabyte X99-SLI - Intel Core i7 6800K Six Core CPU & Motherboard Bundle ***£20 Saving***
 

10+ In stock

£584.98

-2%
Intel i7-6800K 3.40GHz (Broadwell-E) Socket LGA2011-V3 Processor - OEM (CM8067102056201)

3.4GHz base frequency, 3.8GHz Max Turbo Frequency, 6 Cores, 12 Threads, 15MB Cache, 28 PCI-E Lanes

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Intel i7-6800K 3.40GHz (Broadwell-E) Socket LGA2011-V3 Processor - OEM (CM8067102056201)
 

6 In stock

Was: £398.99 £389.99

     
  BUZZ
Thermal Grizzly Kryonaut High Performance... Thermal Grizzly Kryonaut High Performance Thermal Paste -  5.5g / 1.5 ml
James Pell Review 12 Sep 2016 Well over the years I have tried many of the thermal pastes out there, this sits at the top! I was always a AS5 fan but then switched mainly to Céramique 2. I decided to give this stu... more...
Intel i7-6950X Extreme 3.00GHz... Intel i7-6950X Extreme 3.00GHz (Broadwell-E) Socket LGA2011-V3 Processor - Retail (BX80671I76950X)
MR ROGER GRIFFITHS Review 10 Sep 2016 This processor is a pretty impressive piece of kit but the information on the Overclockers page is slightly misleading. Out of the box without special software installed (that may only... more...
Processors

CPU: The Heart of Your System Build

A CPU (short for central processing unit) forms the core of your gaming PC and workstation, and makes up the electronic circuitry that implements any instructions sent by a computer program. A CPU does this by conducting the basic operations-arithmetic, control, input/output (I/O), and logical-as outlined in the instructions. The more your system demands, the more your CPU needs to perform in order to process all the complex information required to run your applications and manage your components smoothly.

Learn more about your system’s CPU-and discover the great range of processors available in our online store-with Overclockers UK, the leading marketplace for PC enthusiasts in the UK. And once you’re happy with your choice of CPU, why not check out our great range of CPU accessories, including CPU coolers, heatsinks, fans, thermal assembly paste, and much more.

Different CPUs for Different Processing Needs

Intel and AMD are the two major producers of CPUs currently available. Generally speaking, CPUs come under three categories:

Low power CPU: A low power CPU doesn’t possess the processing capabilities to handle much more than light requests. For example, the demands of word processing or surfing the internet. As such, overclockers tend not to use this kind of CPU for gaming, video editing, or operating multiple applications at once. A low power CPU is favoured, however, for its low power consumption and low heat output compared to more powerful processor units. This makes them ideal for use in smaller systems such as tablet devices or netbooks, as they usually require a long battery life and do not offer the space to house a CPU heatsink.

Desktop CPU: Desktop CPUs comprise the biggest selection of CPUs on the market. Within this category, you can find a huge range of processing power and performance to meet your requirements. Desktop CPUs are mostly used in mid-level to high-end laptops, desktop computers and tablet devices which offer more speed and power than their slower counterparts. As such, they can produce a much higher heat output, and boast multiple processor cores and perform at a much higher speed. This means that, generally, desktop CPUs demand a form of active cooling, such as a heatsink or fan, for example.

Server CPU: A server CPU is the preferred choice for users who need consistency and reliability as opposed to performance. This kind of CPU has to pass a stringent and demanding stress test during the production process in order for the manufacturer to guarantee that it will be able to perform as expected in any situation. A server CPU is intended to process more data more often than a desktop CPU; as a result it is able to correct memory errors that could impact the system stability. The increased amount of data that is transferred via a server CPU leads to a very high heat output-meaning cooling is of paramount importance for overclockers or anyone else working with this kind of CPU.

Recognising and Enhancing Performance in a CPU

A central processing unit’s performance or speed is measured according to several attributes, with two of the most important being: the clock rate (usually recorded in hertz), and the instructions per clock (IPC). These two attributes form the instructions per second (IPS) that a CPU is able to process. A computer’s processing speed is improved with multi-core processors-this refers to connecting two or more processors into a single integrated circuit. A dual core processor should, in theory, provide twice as much power as a single core processor, however, the actual performance gain is only around 50%. This is down to the less than perfect nature of the software algorithms and implementation. Adding more cores in a processor improves the workload that a CPU can manage. Once this addition has been carried out, a processor will be able to manage multiple asynchronous events, interrupts, and so on, that can have an adverse effect on a CPU when it is under pressure. Occasionally, the additional cores will take care of the same task being handled by a neighbouring core if an individual core cannot process the amount of information being sent.

Overclocked CPUs

Computer central processing units are usually overclocked by tweaking the CPU multiplier; a processor and other components are also able to be overclocked by improving the base speed of the bus clock. There are a few systems where it is possible to carry out additional tweaking of other clocks, for example, a system clock, that affect the speed of the bus clock. Again, this speed is multiplied by the processor to enable small adjustments of the final processor speed.

If you’re looking to upgrade your CPU via overclocking, here are two things to keep in mind:

Cooling: Every time you raise your chip voltage you also increase your power consumption, this significantly increases the amount of heat output from your system. Even if you already have a strong cooling system installed, you will likely need to improve it each time your heat output goes up, otherwise you run the risk of overheating your hardware and other components and causing them to breakdown or become damaged. Common methods of cooling your workstation and overclocked CPU include:

  • Water cooling systems which redirect waste heat to a radiator
  • Thermoelectric cooling devices-these are particularly good for TDP processors manufactured by Intel and AMD at the turn of the 21st century
  • Phase transition, which adopts the cooling system used in refrigerators
  • Liquid nitrogen, liquid helium and dry ice; however these are only used in extreme situations and not in common, everyday use.

CPU locking by manufacturers: This refers to the act of permanently setting the clock multiplier of a CPU. Early editions of AMD CPU models are unlocked, but locked in more recent editions. Virtually all CPUs manufactured by Intel are locked, and the latest models are highly resistant to unlocking. This move was intended to deter overclockers from working with Intel processors.

Whatever CPU upgrade you’re looking to create for yourself, explore the fantastic range of components and accessories on offer at Overclockers UK-you’ll find great products, tips, and a thriving, helpful community to ensure you build the workstation you want.

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