Saying for the 3rd time, it's the Intel thermal adaptive monitor feature.
"The Adaptive Thermal Monitor feature is intended to help protect the processor in the event that an application exceeds the TDP recommendation for a sustained time period. As such during the course of overclocking this can affect the stability of the frequnecy defined. As such it is advised it be disabled when under overclocking and stress testing with high load and high power consumption sythetics or applications. Be advised this will not disable the CPUs internal TCC functionality."
Source: http://benchmarkreviews.com/index.ph...1&limitstart=5
---------- Post added 2013-04-18 at 12:10 AM ----------
You just have to overclock with the turbo ratio and leave the cpu ratio at auto. It's not necessary to overclock with the turbo ratio, but I prefer to. Not that anyone mentioned it here, LLC should be finetuned. If someone can give you the proper llc setting because the Asrock's bios is different than Asus which I'm used to.