68FoMoCo
1 Nickel

RE: I5 6400 turbo boost

Appears at least this Dell has it on by default with the on/off option removed from the bios. Below is from the Intel processor diagnostic tool. I will point out I did get gypped out of .00012 GHz - lol

CPU1

CPU Frequency Test

Module Version: 1.0.16.64b.W

Start Time: Thu Dec 29 09:08:42 2016

Test Result - PASS

Processor Name: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz

Expected CPU Frequency: 2.70

Detected CPU Frequency: 3.29988

Expected Base Clock: 100

Detected Base Clock: 99.9962

Expected frequency - The highest frequency at which the tested processor was manufactured to operate

Detected frequency - The frequency at which the tested processor is currently operating

Power management modes can create marginally higher or lower detected frequency

than expected frequency. Small variations in clock frequencies are common.

QPI link rate Test - Not supported.

Skipping QPI link rate Test.

End Time: Thu Dec 29 09:08:43 2016

Total Time:  seconds: 1