This seems like a good place to discuss customized turbo boost settings in the case of being limited on power.
What I have experimented with is limiting the boost TDP quite heavily (in the 60 watt range, instead of 100+ watts) on a 6700K, yet still allowing the max multiplier to be set quite high, like 48X. What happens is interesting, single or dual core work loads still get boosted to 4800mhz ,since their power consumption is still below 60 watts. The unusual part is what happens under four cores. There isn't enough power available, so of course it does not boost to 4800 mhz, but actually, sometimes it doesn't even maintain the stock frequency, as in-- it will downclock to 3.8 GHZ when four cores are in use. I would really like to know why it does this, but I assume it has got to do with how the processor is estimating the VID needed. When it hits the power limit, it immediately downclocks, but is not very good at estimating the power demanded for the reduced clockspeed, it estimates very conservatively and there is no way to change it.
It sort of reminds me of what happens when a limit is reached in Nvidia Boost 3.0, except with that, the user can set the clock speed curve themselves, so it is much more efficient.
Also:
Asus has a BIOS setting allowing the maximum multiplier to be customized depending on the cores in use, however it doesn't work for me. If it did, then this could be tweaked perfectly so the power limit is never hit and the processor won't try to reduce the clock speed.
