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Computing Hardware (CPU)
N/A
11
Computer Science
10th Grade
10/25/2013

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Term
CPU
Definition

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.

Term
Control Unit
Definition
The control unit works with the CPU to control the flow of data within the CPU.
Term
ALU
Definition

ALU = Arithmetic and Logic Unit

The ALU performs all the arithmetic and logical operations within the CPU

 

Term
RAM
Definition
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.
Term
Cache Memory
Definition
Special high speed memory used by a computer, it is used to store data waiting to be processed.
Term
Primary Storage
Definition

e.g. RAM, Cache memory,...

 Do not hold data when the computer is turned off

Term
Secondary Storage
Definition

e.g. hard drives, flash memory,...

Hold data to be kept when the computer is turned off

Term

Fetch  - Execute Cycle

 

Definition
  •  This is the process of fetching the instructions from memory, decoding them and then executing them so that the CPU peroforms continuosly.
  • This is an endless process and it is the main function of the CPU.

 

Term
Clock Speed
Definition
Term
Overclocking
Definition

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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