COMPONENTS OF COMPUTER

www.bbemmanuell.blogspot.com, www.4sightfinancialfreedom.blogspot.com,

COMPUTER COMPONENTS

GATEWAY INDUSTRIAL & PETRO-GAS INSTITUTE

ONI

Gateway Industrial & Petro-Gas Institute, OniOgun Waterside Local Government Area

P. M. B. 2123, Ijebu OdeOgun State

Compiled by:Bamishaye B. Emmanuel

B. B. Emmanuel, [email protected], +2348062451455 P a g e 1 | 35

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COMPUTER COMPONENTS

TABLE OF CONTENT

Chapter 1: Introduction

Chapter 2: Processor

Chapter 3: Motherboard

Chapter 4: RAM

Chapter 5: Hard Disk

Chapter 6: Card

Chapter 7: Peripherals

Chapter 8: Case and Power Supply




http://f1tutorials.com/Tutorials/Computer_hardwares/chapter8.html



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CHAPTER ONE

INTRODUCTION

Your PC (Personal Computer) is a system, consisting of lots of components. Some of those

components, like Windows XP, Windows Vista, Windows 7, Windows 8, and all your other

programs, are software. That is why we say Software are programs that enhances the functionality

of your computer system. While the electrical, mechanical and physical component parts of the

computer that you can actually see and touch are hardware.

HARDWARE

The hardware are the electrical, mechanical and physical component parts of computer itself

including the Central Processing Unit (CPU) and related microchips and micro-circuitry, keyboards,

monitors, case and drives (hard, CD, DVD, floppy, optical, tape, etc...).

Other extra parts called peripheral components or devices include mouse, printers, modems,

scanners, digital cameras and cards (sound, colour, video) etc...

The devices which are Necessary to assemble a computer:

Motherboard

Processor

Memory

Hard Drive

Video Card (if motherboard didn't come with it)

Sound Card (if motherboard didn't come with it)

Modem and/or Network Card

Floppy Drive

CD-Rom

Keyboard and Mouse

Case And Power Supply





Monitor





CHAPTER TWO

PROCESSOR

The Central Processing Unit, Which is often referred to as the “Processor” is the brain of the

computer. The chip that performs the majority of calculations and instructions needed to make your

computer run. Without this chip, no other function of the PC is possible. The processor is attached

to the motherboard (Processor slot).

THE SPEED OF THE CPU

The computer's speed or clock rate is integral to its overall design. The computers clock rate is the

frequency at which it can execute a set of instructions. Computer clock rates are measured in

Megahertz (million of clock ticks per second).

There are two types of speeds that should be considered when evaluating the system performance:

Internal clock speed – Is the speed at which the processor can obtain information within itself, like

with internal cache and registers. (Pentium III 800 MHz. the 800 MHz is the internal clock speed)

External clock speed – Is the speed at which the CPU communicates with components outside

itself.





SOME COMMERCIALLY AVAILABLE PROCESSORS:

Pentium I-IV

Celeron

Athlon

Duron

Cyrix C3

Itanium (64 bit)

Opteron (64 bit)

HOW TO CHOOSE A CPU

When you are choosing one CPU always consider your computing needs when selecting a CPU. If

you want to do simple word processing or general computer tasks, go for the budget or low end

processors. If you are more into gaming or do CPU intensive work like video editing, go for a mid-

range or high-end processor.





CHAPTER THREE

MOTHERBOARD

Chapter 3.1: Motherboard

Chapter 3.2: How to Choose a Motherboard

MOTHERBOARD

The motherboard is the main circuit board inside your PC. Every components at some point

communicates through the motherboard, either by directly plugging into it or by communicating

through one of the motherboards ports.

The motherboard is one big communication highway. Its purpose inside your PC is to provide a

platform for all the other components and peripherals to talk to each other.







Modern motherboards come with the following features:

Processor slot: Processor slot is used for processor.

Memory banks: Memory banks are used for RAM modules.

AGP slot: AGP slots are used for graphics accelerators.

PCI slots: PCI slots are used to provide connectivity for PCI cards such as modems and

sound cards.

IDE: IDE are used to connect and control IDE devices such as hard drives and CD-ROM

drives.

USB ports: USB ports are used to connect USB devices.

These are just some of the features that a motherboard may have as standard, some motherboards

come with integrated components such as a sound card, graphics card, modem, NIC (Network

Interface Card) and more.

TYPES OF MOTHERBOARDS





The type of motherboards depends on the CPU it was designed for. You can therefore categories

motherboards by which socket type they have. e.g. Socket A, Socket 478 etc.

The Type of motherboard you buy is very important, as it will need to house your CPU, and they are

not interchangeable. When buying a motherboard, it will always tell you what socket type it has.

HOW TO CHOOSE A MOTHERBOARD

As everything you have on the PC at some point needs the motherboard, you need to consider

these components when buying a motherboard. For example, if you have a lot of devices with a PCI

interface that you wish to use, there is little point buying a motherboard that only offers you 3 PCI

slots. Like wise with memory, you have to make sure that there are enough slots for the amount of

memory you have or wish to have.

The motherboard also needs the correct type of interface for your Memory, Graphics card, Hard

disks and other items as well. You will find that most motherboards offer everything you need

however it needs checking on when buying. It’s especially important to pay detail to your

motherboard if you want to use older components, which a new motherboard may or may not

support.

The major difference between motherboards that support the same CPU is the model of the chipset

(more on the chipset later). Different chipsets offer different performance and different features in

terms of memory support, AGP port speed, Multiplier numbers, Bus speeds and much more.

When you are choosing one motherboard you have to consider:

WHAT'S YOUR PROCESSOR?

First and most important thing to consider when buying your motherboard - what CPU or processor

are you using? Motherboards are made differently, not all motherboards will support all CPUs.

What CPU you select will determine the type of motherboard you get. For example, if you want to

use an Intel Pentium 4 CPU, the motherboard you select must be able to support that brand and

model of CPU.





The motherboards are also designed to support specific speeds for a CPU, so make sure it can

support the speed of the processor as well.





CHOOSE YOUR CHIPSET

What is a chipset? Well, chipsets are the main controllers on the motherboard - they allow the CPU

to interface with the various components and expansion cards installed.

When choosing your chipset, always bear in mind the type of memory supported by the

motherboard. Make sure that the board supports the type and amount of RAM you need. Generally,

choosing a chipset that supports high speed memory will allow your system to perform better.

WHAT IS A MOTHERBOARD CHIPSET?

A motherboard chipset controls all the data that flows through the data channels (buses) of the

motherboard. The primary function of the motherboard chipset is to direct this data to the correct

area's of the motherboard, and therefore the correct components.

EXPANSIONS SLOTS AND CONNECTORS

If you intend to various peripherals to the computer, then the number and type of expansion slots

and connectors is important. By default, most motherboards these days have USB 2.0 ports

incorporated into their design.

If you intend to buy expansion cards, make sure the board comes with an ample number of PCI slots.

OTHER FEATURES

These days, most motherboards have a whole host of extra features loaded into them. These can

include things such as on-board VGA, audio, a RAID controller, Modem or Network Card.





CHAPTER FOUR

RAM

RAM (Random Access Memory) is the basic working memory of your

computer system. A computer used RAM to hold volatile (Temporary)

instructions and data needed for processing. Volatile simply means that it

is not permanent, which means anything written to RAM will be loses if

the machine loses power or if it's turned off.

Another key point about RAM is that data stored init can be accessed much more quickly than data

retrieved from the hard disk. Theoretically data retrieved from RAM is accessed 100 to 300 times

faster then the same information from a hard disk, optical drive, or a floppy.

Memory is measured in bytes, so you'll often encounter the terms megabyte (MB) and gigabyte

(GB) in describing RAM sizes (a megabyte is a million bytes; a gigabyte, a billion). RAM is

something that you do not want to skimp on. You can choose a slower processor, but with RAM you

want as much as you can get.

TYPES OF RAM:

1. SDRAM

2. DDR

3. DDR2

4. DDR3





1. SDRAM

Almost all systems used to ship with 3.3 volt,

168-pin SDRAM DIMMs. SDRAM is not an

extension of older EDO DRAM but a new type

of DRAM altogether. SDRAM started out

running at 66 MHz, while older fast page mode

DRAM and EDO max out at 50 MHz. SDRAM

is able to scale to 133 MHz (PC133) officially, and unofficially up to 180MHz or higher. As

processors get faster, new generations of memory such as DDR and RDRAM are required to get

proper performance.

2. DDR MEMORY (184-PIN DIMMS)

These were introduced in 2002 to replace the earlier SDRAM format. To use this type of memory

you need a 184-pin socket for the module to fit into.

DDR Memory is available in different speeds of

PC2100, PC2700, PC3200 (DDR400), and

PC4000 (DDR500). The modules can be used singly or how desired however you cannot mix

different speeds together.

3. DDR2 Memory (240-pin DIMMS).

This format builds on the technology of DDR.

This standard has more pins and its main

developments are the ability to run faster whilst

consuming less power.




http://www.pchardware.co.uk/memory.php#DDR%23DDR


To use DDR2 memory you need a 240-pin socket for the module to slot on your motherboard.

DDR2 Memory is available in many different speeds including PC2-3200 (DDR2400), PC2-4200

(DDR2533), and PC2-5300 (DDR-667).

The modules can be used singly or you can install different speeds of DDR2 memory together if

your motherboard supports the faster speed however faster modules will perform at the lower

speed.

This may be worth considering if you want to run Dual-Channel memory where you must use the

same speed and ideally matching pairs to ensure compatibility.

4. DDR3 MEMORY (240-PINS)

This is the latest memory standard (2008

onwards) taking over from the previous DDR

and DDR2 standards. Although DDR3 comes

with 240-pins the same as DDR2 the notch is in a different place so people can not install the wrong

type.

DDR3 is not backward compatible with DDR2 in addition to the notch the voltage runs at a lower

1.5V than DDR2 1.8V. DDR3 memory will not fit into a standard DDR2 DIMM socket or an earlier

DDR memory socket.

To use DDR3 memory, your system motherboard must have 240-pin DIMM slots and a DDR3-

enabled chipset.




http://www.pchardware.co.uk/memory.php#ddr2%23ddr2

http://www.pchardware.co.uk/memory.php#ddr%23ddr


CHAPTER FIVE

HARD DISK

The hard disk (or hard drive) is the

permanent storage area of your

computer. It stores information whether

the computer is on or off. A hard drive is a

mass storage device found in all PCs

(with some exclusions) that is used to

store permanent data such as the

operating system, programs and user

files.

The data on hard drives can be erased

and/or overwritten, the hard drive is

classed as a non-volatile storage device

which means it doesn't require a constant power supply in order to retain the information stored on it

(unlike RAM).

Inside every hard drive are small round disk-like objects made of either an aluminum/alloy or a

glass/ceramic composite, these are called platters, each platter is coated with a special magnetic

coating enabling them to store data magnetically. Hovering above these platters are read/write

heads that transfer data to and from the platters.

Hard drives come with many different storage capacities, hard drive capacity is measured in bytes,

with common capacities being stated in MB (Megabytes) and GB (Gigabytes).





HARD DRIVE RPM SPEEDS

You will often see hard drives advertised as being capable of a certain RPM (Revolutions Per

Minute), this figure (as the name suggests) refers to how many times the spindle makes a complete

360? Turn in any single minute.

RPM values range from about 5,400RPM to 12,000RPM and above.

HOW TO CHOOSE A HARD DRIVE

When you are choosing one Hard Drive you have to consider:

ATA and SCSI

In the hard drive world, there are two data access standards, ATA and SCSI (pronounced 'Scar-

Zee'). Most of normal hard drives we're used to rely on the PATA standard. Some newer hard drives

use the SATA standard.

SATA allows transfer speeds of up to 150 MBs while PATA gives up to 133 MBs. However, to use

SATA, you'll need a Serial ATA controller, a SATA drive and a SATA power cable. The speed

difference between PATA and SATA is also not significant unless you have a high-end SATA drive.

The SCSI standard is a very fast hard drive standard used for professional computer systems which

demand extremely fast data access. SCSI drives provide an access time of about 9.5ms - which I

feel is really not needed for average home use.

DISK SPACE VS. PRICE

An important factor to consider is the disk space versus price ratio. When you look at the 30 GB, 40

GB and 80 GBPATA hard drives, you'll find they are very close in price. For the average home user,

however, 40 GB to 80 GB of disk space is plenty.

DRIVE SPEED

If data access speed is important to you, you can go for faster SATA drives or SCSI drives. But

remember that these drives come at a price premium and may not be necessary for average home

use.





CHAPTER SIX

Chapter 6.1: Video Card

Chapter 6.2: Sound Card

Chapter 6.3: Modem Card

Chapter 6.4: Network Card

VIDEO CARD

VGA Card is the one

sending the monitor signal

to the monitor.

A computer video card is

placed in the motherboard,

where it transfers video

signals through a cable to

your monitor. The video

card can either be built

into the motherboard or be a separate card that is placed in either the AGP or PCI-Express Slot.

The computer graphics cards major job in a computer is to convert graphic patterns into signals for

the monitor's screen. However in recent times as the graphics card has become more advanced it

has taken some of the jobs previously assigned with the CPU and through a graphics pipeline adds

2D and 3D effects and it also adds textures.









HOW TO CHOOSE A VIDEO CARD

The VGA Card price will change on:

1. VGA Card Processor

2. VGA Card Ram capacity

3. Ram type of VGA Card

When you are choosing one Video Card you have to consider:

The best way to see what video card to buy is to consider how you're using your computer now.

There are several categories:

Server

If you're using your computer as a mail server, FTP server, print server, or even a game server, you

definitely do not need a high-end video card. What you need is a simple, no-frills low-end video

card.

Simple Applications

Say you're using the PC for simple applications only, for example, word processing, email or web

surfing. Again, you do not need the best video card out there. A cheap and decent one will do the

trick.

Complex Applications

If you need to perform more complex tasks like 3D computer aided design or video editing, it will

make more sense to go for a heavy duty card. Screen resolution and image quality tend to be

important factors for this type of work. Look for a video card whose processor which supports a high

screen resolution, with ample graphics memory.

General Games

If you'll only play simple games like Minesweeper, Reverse or Backgammon, then my advice is to

save your money and just get a simple video card. No need for the latest 3D graphics gizmo.





SOUND CARD

The sound card is an essential

component in the PC, since it translates

digital signals into analog audio for your

listening pleasure. Well, that's true, if you

want to play games or run multimedia

applications in your PC. Otherwise, it may not be necessary, especially in business environments.

Sound card ports





A computer sound card is used by a computer for music, sounds during applications and

entertainment (TV, movies and games). A typical sound card usually has four ports. The largest port

is the Midi/Game port, which is used for connecting a joystick or gaming controller to. The other

three ports look similar and are generally green, pink and blue.

Underneath each port will be a small engraving of what each port does. The pink port is for a

microphone which can record sound to the computer. The green port is line out and this is where

the speakers are connected to produce sound from the computer. The blue port is line in and this

is for connecting a CD-player or cassette tape to the computer.

Remember a sound card by itself is not enough to hear sound. You will still need to purchase some

computer speakers or a headphone set. If you want to make use of the microphone feature then

you will need to buy a computer microphone and you should then be able to record sound to your

computer.

How to Choose a Sound Card

When you are choosing one Sound Card you have to consider:

First thing to consider here is your intended usage of the sound card. If all you want is basic

sound support and not spectacular 3D surround sound, I'd say go buy a cheap, simple card

or even rely on your motherboard's on-board sound.

If you want great surround sound and better speaker connectivity options, then you'll want to

consider a dedicated sound card.





MODEM CARD

A device that translates data from your PC into a form

that can be sent to other computers over regular phone

lines. The modem also receives signals from other

computers and converts it into something your

computer can understand. A modem is the device most

home computers use to connect to the Internet.

A Modem converts digital information into sound so that it may be transmitted over telephone lines.

When the modem hears this sound on the other end it converts the sound back into digital

information.

There are two types of modems:

INTERNAL

EXTERNAL

External modems are slightly more expensive than internal modems and are housed in an external

box or enclosure. External modems require a socket on the computer or port (usually the serial port

on the back of your computer.) The serial port is also called a COM port, com for communications.

Network Card

A network interface card, more commonly referred to as

a NIC, is a device that allows computers to be joined

together in a LAN, or local area network. Networked

computers communicate with each other using a given

protocol or agreed-upon language for transmitting data

packets between the different machines, known as nodes.

The network interface card acts as the liaison for the

machine to both send and receive data on the LAN.





The most common language or protocol for LANs is Ethernet, sometimes referred to as IEEE 802.3.

A lesser-used protocol is Token Ring. When building a LAN, a network interface card must be

installed in each computer on the network and all NICs in the network must be of the same

architecture. For example, all must either be Ethernet cards, Token Ring cards, or an alternate

technology.

An Ethernet network interface card is installed in an available slot inside the computer. The NIC

assigns a unique address called a MAC (media access control) to the machine. The MACs on the

network are used to direct traffic between the computers. The back plate of the network interface

card features a port that looks similar to a phone jack, but is slightly larger. This port accommodates

an Ethernet cable, which resembles a thicker version of a standard telephone line. Ethernet cable

must run from each network interface card to a central hub or switch. The hub or switch acts like a

relay, passing information between computers using the MAC addresses and allowing resources

like printers and scanners to be shared along with data.

A network interface card does not have to be hard wired with physical cable. Wireless Ethernet

cards are installed like their wired counterparts, but rather than a port for an Ethernet cable, the

card features a small antenna. The card communicates with the central wireless switch or hub via

radio waves. Wireless LANs may have some restrictions depending on the material the building is

made from. For example, lead in walls can block signals between the network interface card and

hub or switch.

When buying components for a LAN, make sure the NICs and hub or switch have the same

capabilities. The entire network must be either wired or wireless, so a wireless network interface

card cannot talk to a wired switch or hub. In addition, newer versions of hardware will likely support

more features and/or greater speeds than older versions. Make sure your central switch or hub can

utilize the highest capabilities of the network interface card under consideration.





CHAPTER SEVEN

PERIPHERALS

Chapter 7.1: Keyboard and Mouse

Chapter 7.2: Floppy Drive and CD-Rom

Chapter 7.3: Monitor

These two input devices are obviously needed, otherwise you can't interact with the computer

system. These components are fairly standard stuff and can be purchased at pretty cheap prices.

KEYBOARDS

The keyboard is the main input device for

most computers. There are many sets of

keys on a typical “windows” keyboard. On

the left side of the keyboard are regular

alphanumeric and punctuation keys similar

to those on a typewriter. These are used to

input textual information to the PC.

A numeric keypad on the right is similar to

that of an adding machine or calculator. Keys that are used for cursor control and navigation are

located in the middle. Keys that are used for special functions are located along the top of the

keyboard and along the bottom section of the alphanumeric keys.

Keyboards are mainly divided into two types

1. Multimedia keyboard.

2. Ordinary Keyboard.








Areas of keyboard

The keyboard has five areas:

1. The alphabetical keys or the typing keys A – Z

2. The function keys F1 – F12

3. The computer keys (Alt, Ctrl, Esc, Window, print Sc, etc)

4. The dedicated cursor keys (, , , , page up, page down, home, end, insert

etc.)

5. Numeric keypad (containing Arabic numerals and cursor keys)

MOUSE

Mouse is another input device used in computer.

Mouse is a device that controls the movement of the

cursor or pointer on a display screen.

A mouse is a small object you can roll along a hard,

flat surface. Its name is derived from its shape, which

looks a bit like a mouse, its connecting wire that one

can imagine to be the mouse's tail, and the fact that

one must make it scurry along a surface. As you

move the mouse, the pointer on the display screen moves in the same direction.

Mouse contain at least one button and sometimes as many as three, which have different functions

depending on what program is running. Some newer mouse also includes a scroll wheel for

scrolling through long documents.





FLOPPY DRIVE

A 3.5” square holding a flexible magnetic disc that holds

information or data. You need a floppy drive to read the

floppy. A floppy disk can hold only 1.44 megabytes, but

it is portable and allows you to make copies of your files.

CD-ROM

A CD-ROM drive used to be an 'optional extra' in

computers - it is no longer so. Most software packages

come in CD format, so you must have a CD-ROM drive to

read them. Typically, CD-ROM drives today need to be at

least 24X speed to keep up with the newer software

applications out there.

A CD drive connects to the computer motherboard

through two types of cables. The older and more common connection is through the IDE Ribbon

cable . Recently SATA (Serial ATA) drives have been produced and will gradually become more

common. The benefits of having SATA cables is that they are smaller and the transfer rate is higher.

Floppy drives were the main source of data transfer and files were small enough to fit on them.

However, today even CD drives are getting out of date and are fast being replaced by the DVD

ROM and DVD RW Drives.





CD-RW

CD writer is used to write CD. It can also used as

a CD drive. CD can be able to write with different

formats. By using CD writer we can able to write

with different speeds. There are different types of

writers are available in the market with different

writing speeds.

On a CD drive there is usually some numbers

with a x symbol after it. This stands for times, for

example common speeds are 4x, 8x, 16x, 18x,

24x, 32x, 40x and 52x. CD RW drives have

speeds like 24x-10x-40x or 52x-32x-52x.

How to Choose a CD-RW

When you are choosing one CD-RW you have to consider:

Drive Speed

For CD writers, you should generally look for a 40X record speed or faster. If you buy anything that

is slower, it will definitely waste a lot of time when you're burning CDs.

MONITOR

Monitor is the display device. Many times per

second, the video card sends signals out to the

monitor. The information video card sends controls

which dots are lit up and how bright they are,

which determines the picture you see.





Color monitors can display anywhere from 16 to over 1 million different colors. Color monitors are

sometimes called RGB monitors because they accept three separate signals -- red, green, and

blue.

The resolution of a monitor indicates how densely packed the pixels are. In general, the more pixels

(often expressed in dots per inch), the sharper the image. Most modern monitors can display 1024

by 768 pixels, the SVGA standard. Some high-end models can display 1280 by 1024, or even 1600

by 1200.

How to Choose a Monitor

If you're a graphics professional, you may prefer a CRT monitor because they are said to show

more realistic colors. However, the latest high-end LCDs can also give equal color quality.

If you with text most of the time, a LCD is a good choice because the various pixels that you find on

a LCD will have nicely defined edges. This gives sharp and focus letters on the screen.





CHAPTER EIGHT

CASE AND POWER SUPPLY

Chapter 8.1: Case

Chapter 8.2: How to Choose a Case

Chapter 8.3: Power Supply

COMPUTER CASE

The computer case is your computer's

housing. You need this to store your

components, the largest of which is your

motherboard.

TYPES OF CASE

MINI TOWER :

Advantages: Excellent size which can be placed on top

of below of a computer desk.

Disadvantages: While this case does offer

upgradeability it can be filled up much faster then the

Mid-Sized tower.

Recommendations: Great PC for end-users and small businesses.








MID-SIZE TOWER:

Advantages: Excellent case which can fit

below and on top of your computer desk.

Plenty of expandability for new devices

for businesses, end-users, and advanced

users. One of the most used computer

cases found today.

Disadvantages: None

FULL-SIZE TOWER

Advantages: Excellent computer for upgradeability.

Excellent case for a server machine.

Disadvantages: Cost is going to be a lot more then

a standard case. Generally A large case which

cannot be placed on top or beneath a desk.

Recommendations: This case is an excellent

choice for all users and businesses.





DESKTOP

Advantages: Excellent desk computer.

Great use of desk space when monitor is

placed on top of the computer.

Disadvantages: With some types of

desktop cases can be very difficult to

upgrade. Does not really work on the floor.

Recommendations: We recommend that this type of case be purchased by advanced users or

users who plan to have a stand alone machine as a server.

HOW TO CHOOSE A CASE

Choosing a computer case can be difficult if you don't know what you are looking for. The range of

computer cases is huge and bigger, then it’s ever been. So how do you find one that suits you? This

guide will explain how to choose a computer case that suits your needs.

What's your budget?

The first step in choosing a computer case is working out how much you are willing to spend on a

case. If you would like to save money then don't spend a fortune on your case.

However, if you do buy a decent case then it will be unnecessary to upgrade for a long time. I would

say that your case should cost about 5%-10% of your entire budget. So if you are willing to spend

N100,000 on your computer, then spend from N5,000 - N10,000 on your case.





What's your needs

The second step in choosing a computer case is making sure that it has enough room to house all

your components. If you have two CD drives then get a case that has room for the three drives. Put

one at the top and one at the bottom leaving space in between for cooling. Do the same for your

hard drives and floppy drives. Also make sure that your motherboard can fit inside the case. Some

cases are smaller then others and some motherboards are bigger then others so make sure your

motherboard will fit.

Next make sure that there is at least one fan built into the case. I would recommend two fans at

least and if you are really worried about your equipment over-heating then get another fan.

I have a friend who is very worried about over-heating. He has about 6 fans inside his computer and

when he turns it on it sounds like an airplane taking off and all the lights in his house go dim.

So if you are prepared for a little more noise then its a good idea to get an extra fan to cool your

equipment down. However, don't get paranoid about fans, one or two should be fine and unless

there is no circulation your hardware should survive.

Computer Case Style

The last thing to do in choosing a computer case, is to choose what you want the case to look like.

Do you want a black or white case, a fancy or plain case? The range of computer cases on the

market is huge so select one that you like. If you would prefer a cheap computer case then choose

a plain one. Many computer cases come with extras at the front like USB and ports for a headset.

These can be very useful and are worth it for the extra money.

When you are choosing one Case you have to consider:

External Space

The first factor to consider is how much space your PC case is going to take up. Are you placing it

on a tight, crammed desk? Or on a large desk? If you have the space, tower PC cases are a good

choice. If you're short of space, you may wish to consider smaller mini PC cases which are getting

more popular these days.





Internal Space

Another factor to consider is how many components you wish to fit in your PC case. If you're a

computer nut like me, you'll want to fit in a good motherboard, CPU, a couple of hard drives, video

card, LAN card, cooling fans, a CD-ROM drive and a DVD writer. That's a lot of components to be

cramming into a PC case! Again, a good choice would be a tower PC case. However, with so many

components, you have to watch out for overheating problems - make sure you deck out the system

with a couple of good fans.

Motherboard Support

Check that your motherboard can fit into the case! Some cases are flexible enough to support AT,

ATX and Baby-AT boards, but others only support one of these sizes. Even then, you need to be

careful - some cheaper 'ATX' cases don't really fit ATX motherboards. I remember buying a

wonderful ATX motherboard and it couldn't fit into my PC case! Imagine my frustration!

POWER SUPPLY

Most PC cases come with power supplies. With more and more components being fitted into a PC,

you will certainly need enough juice to power them.

Cooling

If you're a over clocker or have many system components, you'll need to ensure you've got enough

fans in that case to cool the system. Good PC cases allow multiple (4 or more) cooling fans to be

installed, ensuring good ventilation.

Looks

Just a few years back, PC cases were boring white boxes. These days, you can find a plethora of

colorful PC cases - if you're concerned about your PC's 'look'. Many PC enthusiasts I know go for

good looking PC cases that come in a variety of colors - red, black, green, blue and what not.









Power Supply

A computer power supply is a compulsory unit to a computer. Without the power supply a computer

is useless as it is just a case full of metal and plastic. This page will explain the different power

cables and connectors and how they work inside your computer.

A power cable connects from the power point to

the power supply where it supply's the

motherboard and other components with power.

Often there is a power switch on the back which

can be switched off to stop the power current. If

this is not switched off and even though the

computer is off power will still be drawn out of the

power point (very small amount).

The most common power supply that we have in

our computers today are the ATX Power Supply. The AT Power Supply was found in many

computers a few years ago but this has become less common.

The graphic below shows each power cable and its name.





The computer power supply is placed inside the computer case generally near the top of the case. It

is sometimes necessary to buy a mini power supply for some cases are so small that they need

one. Most computer cases when bought come with a power supply that is suited to its case. There

are usually power ports on the motherboard for the fans in the case but if not it is possible to buy an

adapter that will convert power from the 4-pin power cable to a fan power cable.




COMPONENTS OF COMPUTER

Education

motherboard motherboard

motherboard chapter

processor chapter

motherboard processor

card chapter

motherboard didnt

introduction chapter

ram chapter