Reprints from my posting to SAN-Tech Mailing List and ...


[san-tech][03367] "Koomey's Law: Computing efficiency keeps pace with Moore's Law", SEPTEMBER 13, 2011, InfoWorld

Date: Thu, 15 Sep 2011 17:26:37 +0900
"Koomey's Law: Computing efficiency keeps pace with Moore's Law"
 Computers have historically doubled in energy efficiency every
 18 months, according to new study
 SEPTEMBER 13, 2011, InfoWorld

Koomey's Lawグラフ (Computations per kWhと年代):

元論文 (有償公開です):
"Implications of Historical Trends in the Electrical Efficiency of Computing"
 IEEE Annals of the History of Computing,
 July-September 2011 (vol. 33 no. 3)
 Jonathan G. Koomey, Stanford University
 Stephen Berard, Microsoft
 Marla Sanchez, Carnegie Mellon University
 Henry Wong, Intel

"The electrical efficiency of computation has doubled roughly every year
 and a half for more than six decades, a pace of change comparable to
 that for computer performance and electrical efficiency in
 the microprocessor era. These efficiency improvements enabled
 the creation of laptops, smart phones, wireless sensors, and other mobile
 computing devices, with many more such innovations yet to come.
 The Web Extra appendix outlines the data and methods used in this study."

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