Hy, I have a i5 6600k processor and an Asus B150m-c motherboard, and the thing is that the processor is currently running at 3.570mhz at full load and it should be running at 3.900. I have tried disabeling the turbo boost tecnology, overclocking the processor and changing the power options in windows, but it stills at that speed. The temperature is 20°c under the higher the processor can reach. Does anybody knows what is the problem?. Thanks everybody.