计算机硬件

Chapter 2: Computer Hardware
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2 Question
022100 In the interest of being ecological, many consumers consider upgrading their computers instead of disposing of them and buying a new one. Which one of the following upgrades is best left to professional technicians? A. Replacing the microprocessor with a newer model B. Adding an external hard drive for backup C. Swapping out a graphics card for a more powerful one D. Adding RAM
Chapter 2
Computer Hardware
Computer Concepts 2013
2 Learning outcomes
1. What are the components of a typical personal computer system? 2. What is a computer form factor? 3. Is a home computer more or less desirable than a game or small business computer? 4. What’s the best way to select a computer?P50 5. Are PCs and Macs compatible? 6. Is it a good idea to upgrade an old computer? 7. How does a microprocessor work? 8. Why are some computers faster than others? 9. Why does a computer need memory?
Figure2: All-in-one Model
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2 Desktop and Portable Computers
Portable computer
A portable computer is a small, lightweight personal computer
Notebook
Chapter 2: Computer Hardware 6
2 Section A: Personal
Computer Basics
Personal Computer Systems Desktop and Portable Computers Home, Game, and Small Βιβλιοθήκη Baiduusiness Systems Buying a Computer Handheld Computers
Desktop Computer
A desktop computer fits on a desk and runs on power from an electrical wall outlet
Figure1: A tower unit
Chapter 2: Computer Hardware
Game computer system
Some of the most cutting-edge computers are designed for gaming
Small Business computer system
Computers marketed for small business applications tend to be middle-of-the-line models pared down to essentials
Chapter 2: Computer Hardware 5
2 FastPoll True/False Questions
Answer A for True and B for False
8. In RAM microscopic electronic parts called capacitors hold the bits that represent data. P60 9. ROM is a type of memory that holds the computer’s startup routine. 10. Hard disk drives, optical drives, and solid state drives are random access devices. 11. CD-RWs allow you to record data, but data cannot be changed once it is recorded. 12. 1080p is a measure of resolution. 13. A surge strip allows you to use your desktop computer during a power outage.
Chapter 2: Computer Hardware
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2 FastPoll True/False Questions
Answer A for True and B for False
1. A netbook is a scaled-down version of a standard notebook computer. 2. Small business computers have better sound and graphics capabilities than home or game computers. P49 3. PCs, Macs, and Linux are three computer platforms. P52 4. Today’s Macs can be configured to run Windows. P52 5. Pentium, Core, ARM7, and Athlon are types of microprocessors. P59 6. Today’s computers typically process 8 bits at a time. P57 7. Serial processing is when a processor begins executing one instruction before it completes the previous instruction.P57
Today, the term home computer system encompasses a vast array of computer configurations designed to accommodate consumers who use computers for personal tasks
A notebook computer (also referred to as a laptop) is a small, lightweight portable computer that opens like a clamshell to reveal a screen and keyboard Costs a bit more than desktop computer
Enhanced media player
Chapter 2: Computer Hardware
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2 Personal Computer Systems
Chapter 2: Computer Hardware
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2 Desktop and Portable Computers
Form factor
The term form factor （外形）refers to the size and dimensions of a component, such as a system board or system unit（主机） Tower unit (figure1) and all-in-one model computer (figure2),
Netbook
A netbook is a small version of a notebook computer
Chapter 2: Computer Hardware
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2 Home, Game,
Home computer system
and Small Business Systems
Chapter 2: Computer Hardware
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2 Buying a Computer
Chapter 2: Computer Hardware
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2 Handheld Computers
Handheld computers
Handheld computers are small, portable devices that allow you to install application software, usually referred to as apps. Three types: enhanced media player, smartphones, and tablets.
Chapter 1: Computers and Digital Basics
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2 Chapter Contents
Section A: Personal Computer Basics Section B: Microprocessors and Memory Section C: Storage Devices Section D: Input and Output Devices Section E: Hardware Security
Chapter 2: Computer Hardware
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2 Buying a Computer
1. Browse through computer magazines and online computer stores to get a general idea of features and prices 2. Decide on a budget and stick to it 3. Make a list of the ways you plan to use your computer 4. Select a platform 5. Decide on a form factor 6. Select peripherals, software, and accessories
Chapter 1: Computers and Digital Basics 2
2 Learning outcomes
10. What is the best type of storage for my data? 11. What factors affect a computer’s screen display? 12. Are ink jet printers better than laser printers? 13. What’s the best way to add devices to a computer system? 14. How can I protect my computer system from theft and damage? 15. Are there guidelines for troubleshooting hardware and software problems?