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CompTIA® A+® Training Kit (Exam 220-801 and Exam 220-802) by Darril Gibson

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Chapter 3. Understanding RAM and CPUs

In this chapter, you’ll learn about two important concepts for any A+ technician to understand: random access memory (RAM) and central processing units (CPUs). A CPU is the brain of the computer, performing most of the processing, and RAM is used to store applications and data being used by the CPU. Both continue to be steadily improved and include a significant amount of technical detail that can easily confuse a regular user. This chapter will help you understand many of the terms used when describing them.

Exam 220-801 objectives in this chapter:

  • 1.2 Differentiate between motherboard components, their purposes, and properties.

    • CPU sockets

  • 1.3 Compare and contrast RAM types and features.

    • Types

      • DDR

      • DDR2

      • DDR3

      • SDRAM ...

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