I noticed when testing today that selecting C1E, C3 or C6 seems to over ride the EIST selection. With EIST enabled or disabled, enabling any of the low power C States will let the multiplier go between the minimum and the maximum.
If EIST is disabled, the CPU will ignore any multiplier change requests in the MSR 0x199 IA_PERF_CTRL register. That's why ThrottleStop does not work correctly when EIST is disabled.. I usually just leave EIST enabled. The Asus bios leaves it enabled whether you select enabled or disabled and I use C6 to save power so the EIST state does not seem to be too important on unlocked Ivy CPUs.
I will try to add MSR 0xE2 - bits[2..0] to the RealTemp C States window for the next version. I think Intel changed the meaning of this register between some of the different Core i CPU versions so if you notice and inconsistencies between what ThrottleStop reports and what MSR 0xE2 shows then post or PM me an example. I lose track of all the forums I am in.
kevindd992002 - Sorry I couldn't keep up with all of your questions.
Ask me 1 or 2 a day so I still have some time left over to work on my projects.