Chapter Summary

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The following points summarize the key concepts in this chapter.


  • The CPU (central processing unit)—a microprocessor—is the centerpiece of today's computers.
  • Clock speed is only one determining factor in identifying overall performance of a processor.
  • Processors are generally defined by their speed, the size of the external data bus, and the size of the address bus.
  • The development of the 80286 processor introduced the concepts of real and protected modes and allowed the use of up to 16 MB of memory.
  • The development of the 80386 processor brought about 32-bit processing and allowed up to 4 GB of memory.
  • The 80486 processor is a souped-up version of the 80386 and introduced the use of cache memory.
  • The Pentium chip began a new line of processors and technology, incorporating RISC and true multithreading capabilities in an Intel microprocessor for the first time.
  • The Intel Pentium III further extended PC performance with advanced cache technology and streamlined code handling.
  • Today's standard processor is the Pentium III, with processor speeds of 500 MHz and greater.

Replacing and Upgrading Chips

  • It is important for a computer technician to know the technological advances made by each successive generation of computers.
  • Simply upgrading the CPU can often lengthen the lifespan of a computer.

Microsoft Corporation - A+ Certification Training Kit
Microsoft Corporation - A+ Certification Training Kit
Year: 2000
Pages: 127 © 2008-2017.
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