- Jan 10, 2019
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I've been searching on CPU design and technology, most people focus on Moore's law, but I think it's more important to focus on EPI(Energy Per Instruction) or Performance/Watt.
Koomey's Law: The number of computations per joule of energy dissipated doubles approximately every 1.57 years, but that ended on 2010.
According to this paper Intel i486 has the same EPI(or Performance/Watt) as a CoreDuo, since that article is quite old I wonder if today's CPU are as energy efficient as i486
"As a result of micro-op fusion and other techniques, each core in the Core Duo processor delivers almost 8 times the scalar performance of the i486 processor while consuming only 8 times the power of the i486 processor. Thus, the Core Duo processor achieves roughly the same EPI as the i486 processor! "
Koomey's Law: The number of computations per joule of energy dissipated doubles approximately every 1.57 years, but that ended on 2010.
According to this paper Intel i486 has the same EPI(or Performance/Watt) as a CoreDuo, since that article is quite old I wonder if today's CPU are as energy efficient as i486
"As a result of micro-op fusion and other techniques, each core in the Core Duo processor delivers almost 8 times the scalar performance of the i486 processor while consuming only 8 times the power of the i486 processor. Thus, the Core Duo processor achieves roughly the same EPI as the i486 processor! "