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1 Technology in Action Chapter 6 Understanding and Assessing Hardware: Evaluating Your System Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Chapter Topics To buy or to upgrade? Evaluating your system

CPU RAM Storage devices Video card Sound card System reliability Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall To Buy or to Upgrade? Things to

consider Moores Law Cost of upgrading vs. buying Time to install software and files Needs and wants Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

To Buy or to Upgrade? Determine your ideal computer system Assess existing computers subsystems CPU RAM Storage devices Video Audio Consider training needs Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

Desktop or Notebook Notebook Desktop Portable Hard to move around More Less expensive expensive Easily Harderstolen to steal Difficult

Easier totoexpand upgrade and upgrade Easy Difficult external to transport expansion Prone to damage Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

How Does the CPU Work? Control unit Arithmetic logic unit (ALU) Machine cycle Fetch Decode Execute Store Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Differentiating CPUs

Processing power Core: A complete processing section from a CPU embedded into the same physical chip Clock speed: How quickly the processor works Cache: The amount of immediate access memory the CPU has Front side bus: connects the processor to system memory Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Evaluating the CPU

Identify your current CPU Determine whether it is meeting your needs Go to Task Manager to review CPU usage Consider how quickly data moves to or from the CPU Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Evaluating RAM Random access memory (RAM)

Temporary storage (memory) Volatile Memory modules fit on motherboard Most are called dual inline memory modules (DIMMs)

DDR2 DDR3 SRAM DRAM SDRAM Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall How Much RAM Do You Need? Physical memory vs. kernel memory Need RAM for operating system, application software, and data

Sample RAM requirements: Application Minimum RAM Required Windows 7 Microsoft Office Professional 2007 Internet Explorer 8 iTunes Adobe Photoshop Elements 1000 MB

256 MB 128 MB 256 MB 512 MB Total RAM required to run all programs simultaneously 2,152 MB or 2.15 GB Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

Virtual Memory Memory-bound system Virtual memory Page file Drawback = speed Increasing RAM can avoid this problem

Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Adding RAM Things to consider Type of RAM module Amount of RAM Maximum limit Number of slots Operating system Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

Storage Types of storage devices Hard drive USB flash drive Optical drive External hard drive Nonvolatile storage Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

The Hard Drive Storage capacity is up to 2 terabytes (TB) Access time is measured in milliseconds Data transfer rate is measured in megabits or megabytes per second Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall How a Hard Disk Works Composed of coated platters stacked on a spindle

Data saved to the disk: Pattern of magnetized spots Spots = 1 Spaces = 0 Spots are translated into data Access arms Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

Read/write head Evaluating Storage Identify your hard drives total capacity Determine your storage capacity needs Consider data transfer rates Internal External Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

Optical Storage Optical media: Store data as tiny pits burned into a disc by a laser Prerecorded CD-ROM, DVD-ROM, BD-ROM Recordable CD-R, DVD-R, BD-R Rewritable CD-RW, DVD-RW, BD-RE

Consider replacing CD/DVD drive with BD burner Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Evaluating Video Two components Video card (adapter) Monitor Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

Video Cards Process binary data into images Contain memory known as video memory Control the number of colors a monitor can display (bit depth) Standard VGA True color Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Graphics Processing Unit Performs the same work as a CPU

Specialized to handle 3D graphics Image and video processing CPUs perform better with a GPU handling graphics computation. Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Evaluating Video Identify the amount of video memory on your video card

Determine your video needs Consider how many monitors you want to use Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Evaluating Audio Sound cards Attach to motherboard Process digital data into sounds 3D sound cards

Surround sound Allow you to connect audio devices Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Evaluating System Reliability Performance problems Slow Freezes Crashes

Upkeep and maintenance System tools Control Panel Update software Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Upkeep and Maintenance

Clean out your Startup folder Clear out unnecessary files Run spyware/adware programs Run the Disk Defragmenter utility Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Update Software and Hardware Drivers Software Patches

Automatic updates Hardware Download updated drivers Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall The Last Resort If problems persist: Upgrade the operating system to the latest version Reinstall the operating system

Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall The Final Decision How closely does your system meet your needs? How much would it cost to upgrade your system? How much would it cost to purchase a new system? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

Chapter 6 Summary Questions How can I determine whether I should upgrade my existing computer or buy a new one? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Chapter 6 Summary Questions What does the CPU do, and how can I evaluate its performance?

Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Chapter 6 Summary Questions How does memory work in my computer, and how can I evaluate how much memory I need? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Chapter 6 Summary Questions What are the computers main storage devices, and how can I evaluate whether

they match my needs? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Chapter 6 Summary Questions What components affect the output of video on my computer, and how can I evaluate whether they match my needs? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Chapter 6 Summary Questions

What components affect the quality of sound on my computer, and how can I evaluate whether they match my needs? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Chapter 6 Summary Questions How can I improve the reliability of my system? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Printed in the United States of America. Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Chapter 16 36

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