This message was posted on behalf of Intel Corporation1 of 1 people found this helpful
Thank you very much for taking the time to reach the Intel® Communities Team.
I understand you are facing some issues with the frequency of your processor which locks in 3.9 GHz when the CPU usage is 50%. Allow me to help you regarding this issue you are facing.
In this case, I would like you to verify the BIOS of your mainboard that the Intel® Turbo Boost Technology and the Intel® Speed Step features are activated. In addition, to make sure everything is fine with your processor, can you run the Intel® Processor Diagnostic Tool? Please share the results in your next post.
Furthermore, I would like to know which tool you are using to verify the usage and frequency of your processor. Is it the Windows * Task Manager or you are using another application?
Thank you friend, I moved the motherboard settings as you suggested and there it was with the speed in "normal" mode and put in performance mode and the motherboard itself overclocked the processor, now it is at 4.5 Ghz, thank you by the attention !!