Presentation 1

Group 3
Agaalofa Filimino
Harota Fruean
Rubysina Maea
The system unit is the main part of a personal computer system,
containing the components necessary for processing information.
There are 8 component of a computer system unit– CPU ,
motherboard, PCI expansion clot, Power supply , Memory slots,
AGVP video card, hard drive and CD drive.
The CPU, or Central Processing Unit performs the
calculations and logic functions of the computer.
CPU's only perform the most basic of functions, such
as adding the contents of a memory location to the
contents of a CPU "register", or comparing the
contents of one register to the contents of another
register and "jump" on a specified condition such as
"equal to", "greater than" or "less than". CPU's are
also able to initiate transfer of large blocks of data,
read or write data to/from peripheral devices, and in
general, watch over system functions. Of course,
this is an oversimplification of the power and
function of the CPU, but it gives you an idea of what
is going on. CPU's have the capacity to perform
many low level functions that are enhanced when
added together into an application. If done
correctly, the entire process is transparent to the
user and all you see is a well designed application.
The heat sink and the CPU needs a fan to cool them
The motherboard is a printed
circuit board (PCB) that
contains and controls the
components that are
responsible for processing
data. A motherboard
provides the electrical
connections by which the
other components of the
system communicate it also
contains the central
processing unit and other
subsystems such as real time
clock, and some peripheral
The power supply
unit converts power
that is provided by
the outlet which
enters usable power
for the many parts in
the computer cabinet.
The power supply is
located in the back of
the box computer.
Power Supply
Memory Slots
It allows chip or stick to enter
the computer. The memory slot
depends on the motherboard, it
can get up to two or four
memory slots. It is also called
RAM—random access memory.
There SDRAM(Synchronous
Data RAM) and
DDRAM(Double Data Rate
RAM) for desktop computers
and SODIMMRAM(Dual-InLine-Memory-Module RAM)
for laptops. They all have
different types of speeds. The
picture below is an example of
memory slots or random access
memory (RAM).
A video card is an internal component that
connects your motherboard to your monitor.
It is usually plugged into your motherboard,
and has a connector at the rear of your
computer to plug in your monitor.
Sometimes the video card is built-into the
motherboard, but it serves the same
purpose. A video card with high memory will
improve the speed of your computer, as it
will be able to show images on screen faster
than a slower one - meaning that the
computers CPU can concentrate on other
things. If you have a video card with 64MB
RAM (memory) for instance, it will run AVI
movies pretty well full-screen. A video card
with only 16MB will be very 'sticky' and
might not play the film at all. You need some
form of video card in your computer or you
won't see anything on the screen.
AGVP Video Card
Hard Drive
The hard disk drive uses a
mechanism that reads and writes
data on a hard disk. Nearly every
computer contains one or more
hard disks. The purpose of the
hard disk drives is that they give
computers the ability to
remember things when the power
goes out. A typical desktop
machine will have a hard disk
with a capacity of between 10
and 40 gigabytes. Data is stored
onto the disk in the form of files.
A Cd drive
the data on
the CD
CD Drive
Thank You For Watching Our Slide Show
We hope that you
understood all the 8
main parts of the system
components and the
way they function.
Hope that we explained
it clearly , loudly , and
productively for you.
Thank you very much ,
God Bless You All ( =