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2 Δεκ 2013 (πριν από 4 χρόνια και 29 μέρες)

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Computer Systems


Unit 2

Download the unit specification from
moodle

or the BTEC website

Or alternatively visit

ahmedictlecturer.wikispaces.com

1. Understand
the components of
computer systems


Internal system unit components:


Peripherals:


Backing storage:


Operating system software:


Software utilities:

Internal system unit components:


Processors;


motherboard;


BIOS;


power supply; fan and heat sink or cooling;


hard drive configuration and controllers
eg

SATA,
IDE, EIDE, master, slave;


ports
eg

USB, parallel, serial


internal memory
eg

RAM, ROM, cache;


specialized cards
eg

network, graphic cards

Processor

CPU


Central processing unit




Processes data


Controls flow of data

to specific
devices

Task 1: List and name few processors that are currently available.


Heat

Sink


Helps to
cool the CPU & not
overheat


PC FAN


to keep the internal
components cool by ventilating air

RAM & ROM


RAM: Random Access Memory


Data held is volatile


i.e

loses data when the
power is OFF






ROM: Read only memory


Data held is non volatile (retainable)

BIOS


Basic input / output system


Stored on a ROM


Checks the actual Hardware (HW)
configuration


Handles the I/O of the PC allowing the OS to
use features of the HW

Cache memory


Acts as a buffer between the CPU and the
RAM in order to have quick access to
commonly used data


Internal Cache is located inside the CPU: also
known as primary cache or Level 1 cache


External cache located on the motherboard
between the CPU and RAM. Also knows as
secondary or level 2 cache

PSU
-

Power supply Unit

Network Interface Card (NIC)

Graphics Card

Due to advancement of the graphical nature of applications; graphic cards
also include it’s own CPU


commonly know as GPU

Motherboard


Most important component


It is a printed circuit board (PCB) that
accommodates all the essential parts of the
PC and provides the connection between
these components

Components together

Report writing…..aiming towards P1


Of all the components discussed today write
in your own words explaining what each of
these components do and how do they
communicate with each other. Use diagrams
to aid your explanation.