Because you have Energy saving on. CIE, C1 state etc are power saving modes that reduce your multiplier and power load when the System is not using it to it's full potential. (you can confirm this by opening CPUZ, Coretemp and running something like Prime95 - you'll see the CPU load reach 100% and speed goes up)
Turn off energy saving and it'll go to the maximum multiplier by default.
~Bex