This message was posted on behalf of Intel Corporation
Thank you for joining the Processors Community. I am sorry to hear you are having issues with this matter.
I checked the specification for your processor model and I noticed that the Intel® Turbo Boost Technology that comes included within your processors is the 2.0 version. This indicates that the feature will be reached whenever the processor needs it, basically the Intel® Turbo Boost Technology 2.0 accelerates processor and graphics performance for peak loads, automatically allowing processor cores to run faster than the rated operating frequency if they’re operating below power, current, and temperature specification limits. Whether the processor enters into Intel® Turbo Boost Technology 2.0 and the amount of time the processor spends in that state depends on the workload and operating environment. And, the matter here and I believe is related to the behavior you are experiencing is that due to varying power characteristics, some parts with Intel® Turbo Boost Technology 2.0 may not achieve maximum turbo frequencies when running heavy workloads and using multiple cores concurrently. By overclocking the processor you are altering these variants and the processor is reaching the frequencies by being forced. Since overclocking voids the warranty, our recommendation at this stage is to update your BIOS version and all the pertinent drivers to the latest from ASRock site.
Hope this helps.