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CPU = Central Processing Unit of the computer containing control unit, ALU and cache memory.
The purpose of the CPU is to process data, it is often described as the brain of the computer. |
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| The control unit works with the CPU to control the flow of data within the CPU. |
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ALU = Arithmetic and Logic Unit
The ALU performs all the arithmetic and logical operations within the CPU
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| RAM = Random Access Memory. Main memory of a computer that stores data, apps and the operating systems whilst use. When the power is turned off RAM loses its data. |
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| Special high speed memory used by a computer, it is used to store data waiting to be processed. |
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e.g. RAM, Cache memory,...
Do not hold data when the computer is turned off |
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e.g. hard drives, flash memory,...
Hold data to be kept when the computer is turned off |
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This is the process of fetching the instructions from memory, decoding them and then executing them so that the CPU peroforms continuosly.
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This is an endless process and it is the main function of the CPU.
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This means that they adjust the clock to run faster thanthe CPU was really designed for.
However, this make the CPU run hotter so extra fans also have to be purchased |
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