Chapter 3. The CPU

This chapter covers the following A+ exam topics:

CPU 101

Installing and Troubleshooting CPUs

You can find a master list of A+ exam topics in the “Introduction.”

This chapter covers CompTIA A+ 220-801 objective 1.6, and CompTIA A+ 220-802 objective 4.2.

The central processing unit, or CPU, is quite often referred to as the “brain” of the computer. Today’s CPUs are like superbrains! A typical CPU today runs at 2 to 3 GHz or higher, uses two or more cores, and some can easily process 100 billion operations per second. That’s a good deal more than you would have seen just 5 years ago. Some mornings I have trouble processing the thought: Need coffee! Of course we know that the human brain is much more sophisticated and functional ...

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