Why is the Intel Turbo Mode not running at maximum speed?
I tested CPU frequencies with either the Intel tool i7z and turbostat from the linux-tools package (sudo modprobe msr, sudo turbostat) and what I find as maximum frequencies for two different processors is lower as what Intel states as maximum turbo frequency.
i5-3210M - Intel specifications max. freq.: 2,5GHz - 3,1GHz Turbo
max. measured: 2,89GHz
i5-3470 - Intel specifications: 3,2GHz - 3,6GHz Turbo
max. measured:3,39GHz
Why are the max. Turbo CPU frequency I can measure running Ubuntu lower than the ones Intel states? Where are the "missing" 0,21GHz?
I tested CPU frequencies with either the Intel tool i7z and turbostat from the linux-tools package (sudo modprobe msr, sudo turbostat) and what I find as maximum frequencies for two different processors is lower as what Intel states as maximum turbo frequency.
i5-3210M - Intel specifications max. freq.: 2,5GHz - 3,1GHz Turbo
max. measured: 2,89GHz
i5-3470 - Intel specifications: 3,2GHz - 3,6GHz Turbo
max. measured:3,39GHz
Why are the max. Turbo CPU frequency I can measure running Ubuntu lower than the ones Intel states? Where are the "missing" 0,21GHz?
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