1) What does the term "GHz" mean? Option Processor speed is measured in gigahertz, or GHz, which refers to the number of machine cycles per second that the processor goes through. So, for example, a 3 GHz processor performs 3 billion machine cycles per second. Option Processor speed is measured in gigahertz, or GHz, which refers to the speed with which the CPU fetches data or instructions from RAM. So, for example, a 3 GHz processor performs 3 billion program instructions per second. Option Processor speed is measured in gigahertz, or GHz, which refers to the speed with which the CPU can decode instructions into something the computer can understand. So, for example, a 3 GHz processor decodes 3 billion program instructions per second. Option Processor speed is measured in the number of programs in the system cycle. So, for example, a 3 GHz processor performs 3 billion machine cycles per second.