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The Purchase of a PC

This article provides information on the various components of a PC, including the microprocessor, internal memory, auxiliary storage, input units, and output units. It helps users make informed decisions when purchasing a PC by comparing different options and considering their needs.

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The Purchase of a PC

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  1. The Purchase of a PC Your Name Goes Here

  2. 5 Components • Microprocessor • Internal Memory (RAM) • Auxiliary Storage • Input Units • Output Units

  3. Microprocessor • Brain of the computer • Current chips for PC • Intel (Celeron, Pentium III and Pentium IV) • AMD (K-6 and Athlon) • Which do I buy? • Pentium IV or Athlon for graphic intensive programs • K-6 or Celeron for business and Internet browsing

  4. Internal Memory (RAM) • Temporary (erased when power turned off) • Measured in bytes • 1 Byte = 1 character (8 bits) • 1 Kilobyte = 210 (~1,000 bytes) • 1 Megabyte = 220 (~1,000,000 bytes) • 1 Gigabyte = 230 (~1,000,000,000 bytes) • Need 64 - 128Mb of RAM • Want to keep multiple programs & data files in memory • Graphic intensive programs demand a lot of memory

  5. Auxiliary Storage (Permanent) • Floppy Disk • Most common is 1.44Mb • LS-120 disk is 120Mb • High Capacity Removable Storage • Zip disks (100 or 250Mb) • Jaz Disks (1 or 2Gb) • Hard (Fixed) Disk • Most common are 10 –30Gb

  6. Auxiliary Storage (Continued) • CD-ROM (650Mb) • Recordable devices also available • DVD drives (4.7Gb-17Gb) • ROM and RAM • Higher capacity than CD • Tape Units • Used for large, unattended back-ups

  7. Keyboard Mouse Trackball Scanner Joystick Pens Ink Jet B/W or color Smears Lasers Highest quality output Input and Output Units

  8. Modems/Network Cards • Fax/Modem • 56Kbps/V.90 • Cable Modem • Uses TV cable • DSL Modem • Voice and Data on same line • Network Cards

  9. Additional Devices • Multimedia • CD ROM or DVD • Sound Card • Speakers • Other Devices • Scanner • Camera

  10. Purchasing Decisions • Local store versus mail order • Magazines • Internet • Use credit card to double warranty • 30-day price guarantee • Don’t forget the software • Windows 98 (included) or 2000 • Microsoft Office (check the version)

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