KNOWING A KNOWING A PERSONAL COMPUTER PERSONAL COMPUTER

(PC)(PC)

SYSTEM UNITSYSTEM UNIT

System Unit is a System Unit is a metal or plastic metal or plastic

casing boxcasing box

SYSTEM UNITSYSTEM UNIT

A System Unit consists of a :A System Unit consists of a :1.1. MotherboardMotherboard2.2. DrivesDrives3.3. A Power SupplyA Power Supply4.4. Memory CardMemory Card5.5. Adapter CardAdapter Card

SYSTEM UNITSYSTEM UNIT

In front of a system unit, we In front of a system unit, we can see the following parts:can see the following parts:

SYSTEM UNITSYSTEM UNIT

Inside a system unit, we can Inside a system unit, we can see the following parts:see the following parts:

SYSTEM UNITSYSTEM UNIT

MotherboardMotherboard

Motherboard is Motherboard is a main a main electronic electronic board. board.

It holds a It holds a Central Central Processing Processing Unit, Memory Unit, Memory and Adapter and Adapter Cards.Cards.

Central Processing Unit (CPU)Central Processing Unit (CPU)

A CPU is an A CPU is an electronic electronic chip.chip.

It is the ‘brain’ It is the ‘brain’ or ‘heart’ of a or ‘heart’ of a PC. PC.

It processes It processes data and data and information. information.

Computer MemoryComputer Memory

A computer memory is a small A computer memory is a small data storage device.data storage device.

Computer memory has two Computer memory has two type :type :

1.1. Random Access Memory Random Access Memory (RAM)(RAM)

2.2. Read Only Memory (ROM)Read Only Memory (ROM)

Random Access Memory (RAM)Random Access Memory (RAM)

It holds information / data It holds information / data temporarily that we might temporarily that we might need to access quickly.need to access quickly.

Read Only Memory (ROM)Read Only Memory (ROM)

It stores data permanently.It stores data permanently.