and min processor state is set to 100%
Both the Ultimate Performance power plan and the High Performance power plan set the Minimum processor state to 100%. There is no difference there. I prefer to run my CPU at a constant 5000 MHz rain or shine, full load, idle or anywhere in between. As long as the low power C states are enabled, the difference in power consumption as measured at the wall is minimal when comparing the Balanced power plan to either the Ultimate or High Performance power plans.
You can use HWiNFO to monitor C state activity. As long as the C states are enabled in the BIOS, they should work in any of the default Windows power plans including the Ultimate Performance power plan.
I also confirm turbo clocks work fine as well, even the extra 100mhz for the 2 best cores.
I have not done any turbo boost 3.0 testing. Thanks for confirming that.
What will murder idle power though is you disable c-states completely
That is definitely true. With all of the C states disabled including C1, power consumption of my idle CPU is up over 125 Watts and the idle core temperatures are up almost 30°C.