OCR GCSE Computer Science · J277
Paper 1
Revise: CPU Characteristics and PerformanceClock speed is the number of clock cycles per second. It is measured in hertz (Hz), with modern CPU speeds usually expressed in gigahertz (GHz).
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GCSE Computer Science · key term
A unit of frequency equal to one billion cycles per second: .
Used by OCR
Paper 1
Revise: CPU Characteristics and PerformanceClock speed is the number of clock cycles per second. It is measured in hertz (Hz), with modern CPU speeds usually expressed in gigahertz (GHz).
Clock speed measures clock cycles per second, not necessarily completed instructions per second. Do not multiply GHz by the number of cores to claim an exact instruction rate.
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