clock rate

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clock rate

[′kläk ‚rāt]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Clock Rate


the change in clock correction per unit time. Different types of clock rates, such as diurnal and hourly, are distinguished, depending on the unit of time selected. With a negative clock rate, the clock runs fast; with a positive rate, it falls progressively behind true time. The magnitude of the clock rate depends on the adjustment of the clock but is not a reflection of the clock’s quality. It is affected by various factors related to the design of the clock mechanism and to external conditions of its operation. Therefore, whenever the precise time is required, as for example in astronomy, several clocks are used, and their rates are carefully studied by daily comparisons of their readings.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

clock rate

(processor, benchmark)
The fundamental rate in cycles per second at which a computer performs its most basic operations such as adding two numbers or transfering a value from one register to another.

The clock rate of a computer is normally determined by the frequency of a crystal. The original IBM PC, circa 1981, had a clock rate of 4.77 MHz (almost five million cycles/second). As of 1995, Intel's Pentium chip runs at 100 MHz (100 million cycles/second). The clock rate of a computer is only useful for providing comparisons between computer chips in the same processor family. An IBM PC with an Intel 486 CPU running at 50 MHz will be about twice as fast as one with the same CPU, memory and display running at 25 MHz. However, there are many other factors to consider when comparing different computers. Clock rate should not be used when comparing different computers or different processor families. Rather, some benchmark should be used. Clock rate can be very misleading, since the amount of work different computer chips can do in one cycle varies. For example, RISC CPUs tend to have simpler instructions than CISC CPUs (but higher clock rates) and pipelined processors execute more than one instruction per cycle.
This article is provided by FOLDOC - Free Online Dictionary of Computing (

clock speed

The internal heartbeat of a computer, also known as "clock rate." The clock circuit uses fixed vibrations generated from a quartz crystal to deliver a steady stream of pulses to the CPU. See clock and MHz.
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References in periodicals archive ?
Internal lean practices and operational performance: The contingency perspective of industry clockspeed. International Journal of Operations & Production Management, 33(5), 562-588.
This is a promising change from what we've seen previously on Realme phones, where the CPU was always at its peak clockspeed while benchmarks would run.
For instance, the clockspeed or maturity of an industry could influence the supply chain characteristics of the firms within the industry.
Strategic schemas, strategic flexibility, and firm performance: The moderating role of industry clockspeed. Strategic Management Journal, 28(3), 243-270.
(41.) The Clockspeed Dilemma: What Does it Mean for Automotive Innovation?, KPMG, Nov.
The fact that the TITAN V was able to achieve a comfortable lead with a clockspeed disadvantage (at stock) is a testament to Volta and the work that NVIDIA has put into the GPU.
CLOCKSPEED IS A TERM coined by Charles Fine, an MIT professor, to define rapidly evolving industries--those with a fast clock speed that he likened to fruit flies that are born, mature and expire in a very short time.
(1999): Clockspeed: Winning Industry Control in the Age of Temporary Advantage, Perseus Publishing
One of my favorite industries to follow is the recorded music industry because it has an exceptionally fast clockspeed. That is a term coined by MIT professor Charlie Fine to identify industries with very fast reaction cycle times to change.