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Chapter 3: How to Speak Geek and Make Informed Purchasing Decisions

Chapter 3: How to Speak Geek and Make Informed Purchasing Decisions. Computer Literacy. Introduction. Performance: Speed, Capacity, and Sophistication The Right Tool for the Job: Choosing the Best Computer for Your Needs Other Factors to Consider. Performance Issues.

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Chapter 3: How to Speak Geek and Make Informed Purchasing Decisions

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  1. Chapter 3:How to Speak Geek andMake Informed Purchasing Decisions Computer Literacy

  2. Introduction • Performance: Speed, Capacity, and Sophistication • The Right Tool for the Job: Choosing the Best Computer for Your Needs • Other Factors to Consider

  3. Performance Issues • Three factors affect performance: • Speed • Capacity • Sophistication

  4. Potential Bottlenecks

  5. Performance: Speed • Measured in hertz • One hertz (Hz) = one cycle per second • One kilohertz (KHz) = 1000 Hz • One megahertz (MHz) = 1,000,000 Hz • One gigahertz (GHz) = 1,000,000,000 Hz • Typical CPU today runs at 2.5+ GHz

  6. Performance: Capacity • Hard drive • RAM • Measured in bits and bytes • One bit = either a 1 or 0 • One byte = 8 bits • One kilobyte (KB) = 1024 bytes • One megabyte (MB) = 1024 KB • One gigabyte (GB) = 1024 MB

  7. Performance: Capacity • Hard drive • Stores OS and programs • Stores data • Used by CPU for temporary storage • RAM • Used by CPU for running programs

  8. Performance: Sophistication • Can the processor handle the job? • CPU variations • Video card processor variations • Branding issues: How can you tell which CPU or card is better? • Web sites like Ars Technica can help • www.arstechnica.com • Look for “Guides”

  9. Choosing the Best Computer for You Windows • Operating systems Linux Macintosh

  10. Choosing the Best Computer for You • Form Factor • Desktop • Laptop

  11. Choosing the Best Computer for You • Hardware needs • Any computer can handle office tasks • Specialized hardware required for gaming and multimedia • Software needs • Bundled software • Essential add-ons

  12. Other Factors to Consider • Warranty • Tech support • Compatibility with other computer equipment

  13. Other Factors to Consider • Recycling

  14. Summary • Performance: Speed, Capacity, and Sophistication • The Right Tool for the Job: Choosing the Best Computer for Your Needs • Other Factors to Consider

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