I decided to start tweaking my newly built X99 build -- while waiting for EK's Gen-2 Predator coolers to release in Q2 2017 (the current Predators got discontinued before NCIX re-stocked; been keeping in touch with EK's Affiliate here on LTT). After a bit of frustration, it seemed like Broadwell-E chips needed to have XMP enabled before your overclock settings -- more particularly, the CPU Core Ratio -- apply, or I am doing something wrong.   I did not have this issue with my i5-4690K