CPUID i see 8-39 multiplier. In many tests, Maximum turbo core clock = 379* and no 389* And for what does not reach the limit 3900 ?
And last version CPUID i display 8-39 multiplie but last version AIDA64 CPU 38 multiplie.
And Why base frequency is not equal to 100 and equal = 99.94
I am sorry to hear you are having problems but let me help you.
The internal algorithms in the processor calculate the clock speed allowing the processor to reach up to 3.9 GHz automatically.
If you are in doubt with the performance on the processor I recommend you running the processor diagnostic tool so that you can test the internal components. Here you have the download link: