The term "gigahertz," or "GHz," refers to the operating speed of a central processing unit; hertz defines the clock rate, or cycles per second, of the CPU. 1 GHz is equivalent to one billion hertz.

One of the most frequently touted measures of processor performance is a given chip's speed in gigahertz. Processors with higher GHz ratings can, theoretically, do more in a given unit of time than ...

Ahead of last Friday's launch of the new Retina MacBook, we saw several early benchmarks for the entry-level notebook running a 1.1 GHz Intel Core M processor, putting CPU performance for the new ...