2. A CASE CONTAINS
ELECTRONIC
COMPENENTS OF
THE COMPUTER
USEDTO PROCESS
DATA
SYSTEM UNITS
CONTAIN
MOTHERBOARD
PROCESSOR
MEMORY
DRIVE BAY
POWER SUPPLY
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3. MOTHERBOARD
THE MAIN CIRCUIT BOARD OF THE
SYSTEM UNIT.
A COMPUTER CHIP CONTAINS
INTEGRATED CIRCUITS
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4. PROCESSOR
ALSO KNOWN AS
CENTRAL
PROCESSING UNIT
(CPU)
CPU INTAPRATES
AND CARIES OUT
THE BASIC
INSTRUCTION THAT
OPERATE A
COMPUTER
CPU CONTAINS
CONTROL UNIT(CU)
○ DIRECTS AND
CORDINATES
OPERATIONS IN
COMPUTER
ARITHMETICS
LOGIC UNIT (ALU)
○ PERFORM
ARITHMETICS,
COMPARISON AND
LOGGICAL
OPERATIONS
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6. THE PROCESSOR
CONTAINS
REGISTERS, THAT
TEMPORARILY HOLD
DATA AND
INSTRUCTIONS
THE SYSTEM CLOCK
CONTROLS THE
TIMING OF ALL
COMPUTER
OPERATIONS
THE PACE OF SYSTEM
CLOCK IS CALLED THE
CLOCK SPEED AND
MEASURED IN
GIGAHERTZ (GHz)
A PROCESSOR CHIP
GENERATES HEATS THAT
COULD CAUSE THE CHIP
TO BURN UP
REQUIRE ADDITIONAL
COOLING
HEATS SINKS
LIQUID COOLING
TECHNOLOGY
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7. CONSISTS OF
ELECTRONIC
COMPENENTS THAT
STORE
◦ INSTRUCTIONS
WAITING TO BE
EXUCATED BY THE
PROCESSOR
◦ DATA NEEDED BY
THOSE INSTUCTIONS
◦ THE RESULTS OF
PROCESSING DATA
BASIC ITEM THAT
BEEN STORE
THE
OPERATING
SYSTEM AND
OTHER
SYSTEM
SOFTWARE
APPLICATIONS
PROGRAMS
DATA BEING
PROCESSED
AND THE
RESULTING
INFORMATION
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8. MEMORY SIZE
Term Abbreviation Approximate
Number Of
Bytes
Exact Number Of
Bytes
Approximate
Number Of
Pages Of Text
Kilobytes KB And K 1 Thousand 1,024 ½
Megabytes MB 1 Million 1,048,576 500
Gigabytes GB 1 Billion 1,073,741,824 500,000
Terabytes TB 1 Trillion 1,099,511,627,776 500,000,000
•EACH LOCATIONS MEMORY HAS AN ADDRESS
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9. Volatile
memory
• Loses its contents when power is turned
off
• Example : RAM
Nonvolatile
memory
• Does not loses contents when power is
removed
• Example: ROM, flash memory and CMOS
Type of memory
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11. A bay is an opening inside the system unit
in which you can install additional
equipment
A drive bay typically holds disk drives
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12. POWER SUPPLY
Converts the wall outlet AC power into
DC power.
Some external peripherals have an AC
adapter, which is an external power
supply.
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13. REFERENCES
Book
Information Technology Fundementals Module (MARA
Professional Collage, Seri Iskandar)
Internet
http://www.youtube.com/watch?v=kStK089WDj4&featur
e=related
http://en.wikipedia.org/wiki/Volatile_memory
http://www.techterms.com/definition/system_unit
http://en.wikipedia.org/wiki/Power_supply
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