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This is a hypothetical question about how a CPU operates. If I purchase two similar CPUs, and use one lengthy term (say one year), will it be identical in speed to the unused CPU? will certainly the number of clock cycles, latency of requests, etc on the used CPU be less than that of the unused CPU?
A supporting debate may be that mechanical tools degrade end time, while a CPU has no relocating parts (other 보다 the exterior fan), that does have circuits that have the right to be damaged through heat, and also voltage spikes. Allows say the after a year of extensive use, the circuits degrade and fewer electrons have the right to pass since the pathway is narrower, etc.
Is this the nature of exactly how a CPU operates, or is it just working or broken, through no speed degradation in between?
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edited Aug 2 "12 in ~ 19:30
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Is the performance of a CPU affected as the ages? ~ a year of intensive use, the circuits degrade and also fewer electrons can pass since the pathway is narrower, etc.
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the rate of a CPU is established by a crystal oscillator - so much as I recognize this is one external part for many CPUs
Picture from TechRepublic article
Crystals undergo slow-moving gradual change of frequency with time, recognized as aging.
However, I doubt this is not a far-reaching factor.
Drift with age is frequently 4 ppm because that the very first year and 2 ppm every year because that the life of the DT-26 crystal.
(from TI concerning an RTC IC but I believe this price is comparable for timing crystals in general)
CPU Semiconductor changes
Breakthrough posted a link to one IEEE article that describes the myriad of means that semiconductors are impacted over time.
It is feasible therefore that the best clock rate the CPU is qualified of will certainly decrease end time. But in most cases this will certainly not cause the CPU"s theoretical maximum possible speed come fall, within a year, below the actual operation speed set by the decision oscillator. As such a CPU that has been stored because that a year will certainly run at the very same speed together an originally the same CPU that has actually been offered continuously for a year.
CPU heat regulation
Many CPUs mitigate their rate if your temperature above a pre-set threshold. The main determinants that might reason a one-year-old CPU to overheat space not to execute with semiconductor destruction within the CPU itself. As such these determinants have no bearing top top the concern as formulated.
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It is unlikely the a offered pair of identical CPUs will diverge in ability within one year sufficiently to trigger thermal issues that require one of them to operation itself at a decreased speed. In ~ least, I know of no proof that this has emerged within one year on a an equipment that is not considered a warranty failure due to manufacturing defect.
CPU power efficiency
Many computers, especally portable ones, are likewise designed to reduce energy intake when idle. Again this is no really appropriate to the question as stated.