ICT IGCSE Theory – Revision Presentation
1.2 The Main Components of Computer Systems
Chapter 1: Types and components of computer systems
• Describe the central processing unit including its role
• Describe internal memory, i.e. ROM and RAM and the differences between them
• Define input and output devices and describe the difference between them
• Define secondary/backing storage
WWW.YAHMAD.CO.UK
, ICT IGCSE Theory – Revision Presentation
1.2 The Main Components of Computer Systems
Chapter 1: Types and components of computer systems
Describe the central processing unit including its role
• The CPU is the 'brain' of the computer.
• It is where all the searching, sorting, calculating
and decision making takes place.
• The speed of the CPU is measured in Gigahertz
(GHz).
• A 1 GHz CPU can carry out 1 billion instructions per
second!
• Intel and AMD are the most popular CPU brands.
WWW.YAHMAD.CO.UK
1.2 The Main Components of Computer Systems
Chapter 1: Types and components of computer systems
• Describe the central processing unit including its role
• Describe internal memory, i.e. ROM and RAM and the differences between them
• Define input and output devices and describe the difference between them
• Define secondary/backing storage
WWW.YAHMAD.CO.UK
, ICT IGCSE Theory – Revision Presentation
1.2 The Main Components of Computer Systems
Chapter 1: Types and components of computer systems
Describe the central processing unit including its role
• The CPU is the 'brain' of the computer.
• It is where all the searching, sorting, calculating
and decision making takes place.
• The speed of the CPU is measured in Gigahertz
(GHz).
• A 1 GHz CPU can carry out 1 billion instructions per
second!
• Intel and AMD are the most popular CPU brands.
WWW.YAHMAD.CO.UK
