A processor clock speed that determines how many instructions per second the processor can execute The higher the number of GHz, the more powerful the processor in the computer Processors are silicon chips that manage the logic in computers and other digital devices (Webopedia)
Gigahertz: One billion radio waves, or cycles, per second Equal to 1,000 megahertz, which is equal to 1,000 kilohertz, which is equal to 1,000 hertz The abbreviations used are: GHz, MHz, KHz, and Hz