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Central Processing Unit (CPU), or sometimes simply processor, is the component in a digital computer capable of executing a program.(Knott 1974) It interprets computer program instructions and processes data. CPUs provide the fundamental digital computer trait of programmability, and are one of the necessary components found in computers of any era, along with primary storage and input/output facilities. A CPU that is manufactured as a single integrated circuit is usually known as a microprocessor. Beginning in the mid-1970s, microprocessors of ever-increasing complexity and power gradually supplanted other designs, and today the term "CPU" is usually applied to some type of microprocessor.

The phrase "central processing unit" is a description of a certain class of logic machines that can execute computer programs. This broad definition can easily be applied to many early computers that existed long before the term "CPU" ever came into widespread usage. However, the term itself and its initialism have been in use in the computer industry at least since the early 1960s (Weik 1961). The form, design and implementation of CPUs have changed dramatically since the earliest examples, but their fundamental operation has remained much the same.

Early CPUs were custom-designed as a part of a larger, usually one-of-a-kind, computer. However, this costly method of designing custom CPUs for a particular application has largely given way to the development of mass-produced processors that are suited for one or many purposes. This standardization trend generally began in the era of discrete transistor mainframes and minicomputers and has rapidly accelerated with the popularization of the integrated circuit (IC). The IC has allowed increasingly complex CPUs to be designed and manufactured in very small spaces (on the order of millimeters). Both the miniaturization and standardization of CPUs have increased the presence of these digital devices in modern life far beyond the limited application of dedicated computing machines. Modern microprocessors appear in everything from automobiles to cell phones to children's toys.
 

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CPUs

Compare CPUs prices from a wide range of UK shops on Mister-Price UK. Browse through the CPUs offers below, showing the best processors from Intel, AMD, Evergreen Technologies and more.

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211 results | Page 1 of 14 | next page
Intel Core 2 Duo E6850 Processor BX80557E6850

Intel Core 2 Duo E6850 Processor BX80557E6850

Intel Core 2 Duo E6850 Socket 775 Processor

 Misco Computer Products
£129.99
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Intel Core 2 Quad Q8200 - 2.33 GHz, 4 MB L2 Cache,...

Intel Core 2 Quad Q8200 - 2.33 GHz, 4 MB L2 Cache,...

Best prices on over 45,000 products IN STOCK! Next day and standard delivery options available. Uk spec + dedicated after sale service.

 Pixmania - Computing
£147.00
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Intel Core 2 Duo E8400 - 3 GHz, 6 MB L2 Cache, 775...

Intel Core 2 Duo E8400 - 3 GHz, 6 MB L2 Cache, 775...

Best prices on over 45,000 products IN STOCK! Next day and standard delivery options available. Uk spec + dedicated after sale service.

 Pixmania - Computing
£107.00
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Intel E2200 Pentium Dual-Core Processor - 2.20 GHz,...

Intel E2200 Pentium Dual-Core Processor - 2.20 GHz,...

Amazon UK
£65.67
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Intel XEON E5420 2.5GHZ 12MB (BX80574E5420A)

Intel XEON E5420 2.5GHZ 12MB (BX80574E5420A)

This industry's first quad-core processor for mainstream servers provides breakthrough performance and capabilities for the ultimate in powerful, dense and energy efficient servers. With the Quad-Core Intel Xeon processor you get breakthrough performance

 Dabs.com
£230.99
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Hiper 880W 85% Efficient PSU - Quad SLI Ready,...

Hiper 880W 85% Efficient PSU - Quad SLI Ready,...

ebuyer
£81.28
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AMD AMD Phenom 8650 Triple Core Socket Am2+...

AMD AMD Phenom 8650 Triple Core Socket Am2+...

AMD Phenom 8650 Triple Core Socket Am2+ Processor

 Misco Computer Products
£89.99
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Intel 700MHz Celeron 66MHz Processor

Intel 700MHz Celeron 66MHz Processor

Get great performance for your personal computing and the quality and reliability you expect from the Intel Inside brand with Intel Celeron processors for desktop PCs. Discover how Intel Celeron processors for desktop computing give you the performance to

 Overstock
£7.04
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Intel Core 2 Duo E8400 3.0GHz Processor

Intel Core 2 Duo E8400 3.0GHz Processor

Core 2 Duo E8400A Processor

 Overstock
£131.26
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Corsair 750W TX PSU - 120mm Fan, 80+%...

Corsair 750W TX PSU - 120mm Fan, 80+%...

ebuyer
£84.29
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Intel E7300 Core 2 Duo - 2.66 GHz, Cache L2 3 MB...

Intel E7300 Core 2 Duo - 2.66 GHz, Cache L2 3 MB...

Best prices on over 45,000 products IN STOCK! Next day and standard delivery options available. Uk spec + dedicated after sale service.

 Pixmania - Computing
£94.00
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Intel Core 2 Duo E6550 Processor BX80557E6550

Intel Core 2 Duo E6550 Processor BX80557E6550

Intel Core 2 Duo E6550 Socket 775 Processor

 Misco Computer Products
£114.99
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Enermax 1000W Galaxy CrossFire EGA1000EWL ATX2.2...

Enermax 1000W Galaxy CrossFire EGA1000EWL ATX2.2...

ebuyer
£165.57
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Acer Aspire M1640 Intel Celeron C440 2GHz 512MB...

Acer Aspire M1640 Intel Celeron C440 2GHz 512MB...

ebuyer
£171.99
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From Amazon Marketplace: AMD Processor - 1 x Athlon 64 X2 5200+ / 2.6 GHz -...

From Amazon Marketplace: AMD Processor - 1 x Athlon 64 X2 5200+ / 2.6 GHz -...

Postage and packaging costs are calculated according to the weight of your purchased item. Please check site for full details. Increase your computer's performances by up to 80% with the AMD Athlon 64 X2 dual-core processor from Intel! You'll be able to w

 Amazon Marketplace
£44.00
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211 results | Page 1 of 14 | next page