SYSTEM UNIT _HARDWARE

OKAY..NOW WE GONNA LEARN ABOUT SYSTEM UNIT WHICH IS HARDWARE..
FIRST OF FOREMOST, WHAT IS SYSTEM UNIT??

SYSTEM UNIT : A CASE THAT CONTAINS & PROTECTS 'MOTHERBOARD', HARD DRIVE,MEMORY & OTHER ELECTRONIC COMPONENTS.

INSIDE OF SYSTEM UNIT

WHAT IS INSIDE SYSTEM UNIT?

1. MOTHERBOARD 
2. MEMORY SLOT
3. ADAPTER CARD
4. CENTRAL PROCESSING UNIT (CPU)
5. DVD ROM
6. HARD DISK
7. COOLING FAN + HEAT-SINK

MANUFACTURE OF PROCESSOR

REMEMBER THIS OUT!!

1. FETCH: fetch data from memory
2. DECODE: translate instruction into signals computer can perform
3. EXECUTE : process of carrying out the commands
4. STORE: writing results to memory

FUNCTIONS OF MEMORY

RAM

• MAIN MEMORY
• CAN BE READ & WRITTEN BY PROCESSOR
• HOLDS DATA THAT CURRENTLY USED BY PROCESSOR
• NON-VOLATILE ( LOSES CONTENT WHEN COMPUTER POWER OFF)

ROM

• REFERS TO MEMORY CHIPS STORING PERMANENT DATA & INSTRUCTION 
• DATA CANNOT BE MODIFIED
• VOLATILE ( NOT LOSES DATA WHEN COMPUTER POWER OFF)
•