Glossary

Gigahertz (GHz)

11.07.08

GHz is an abbreviation for gigahertz, which is a multiple of the base unit, hertz.

The hertz is a measure of frequency, informally defined as the number of events occurring per second. It is the basic unit of frequency in the International System of Units, and is used worldwide in both general-purpose and scientific contexts. Hertz can be used to measure any periodic event; the most common uses for hertz are to describe radio and audio frequencies, more or less sinusoidal contexts in which case a frequency of 1 Hz is equal to one cycle per second.

Gigahertz is also commonly used to describe the speed of computers' central processing units (CPU). As a general rule, the higher the CPU's speed (GHz) the higher the performance of the computer. (In reality, however, the effective power of a computer relies on other measurements besides the speed of the CPU.)
URL: http://www.tech-faq.com/ghz.shtml
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