In case the other comments are not clear, overclocking via BCLK is usually detrimental to other components linked to the BCLK bus like SATA and the PCI-E slots. Intel, being the Frankensteino El Lobotomo extraordianire of the techno-mumbo-jumbo universe, knew when they released the then new multiplier limited/lobotimised 3820 CPU for the LGA2011, that they would not be selling any 3820 for the LGA2011 [other than to their orgiastic foot-snifflings] unless they find a way to facilitate overclocking of this deliberately brain-deadened 3820 multiplier limited CPU if only because their own competitive 3770K [and its predecessors] will kill the 3820 dead on the spot when it comes to trying to claw back some value-added points for this donkey/ass/superficial-pretender of a CPU. That way/means to fooling Da Stupido-Dumbo is Convolution Heaven Overclocking via BLCK. For this "sin", Intel's "Sinners", whenever they are overclocking a LGA2011 mobo via BCLK, will NOT be overclocking their SATA or PCI-E slotted add-ons as well.
This is Convolution Heaven because for ANY other contemporary non-LGA2011 mobo, overclocking via BCLK WILL be overclocking/potentially-damaging other components coupled to the BCLK bus. Even now, this is not clear to many, such is the effectiveness of Intel's sly of hand trick - ie. their manipulative prowess over their cohorts of foot-snifflers.
A true human is the one who tries his best to raise his fellow human's awareness whereas the superficial/Over-vs-Under human is the one who tries his best to dumb-dwon his fellow human via creatively parasiticals like "Overclocking via BCLK". At least for the EOL 4820K, Intel is atoning for its sin - perhaps not because of Guilt [because Guilt is merely Anger suppressed] but because of the very many non-LGA2011/non-E/Sandy-Ivy mobos frying their HDDs, GPUs, etc. But not when the well-fried HDDs or GPUs are outta warranty, me duck, of course. Or perhaps there are real humans running amok within Infinitisers like Intel. Perhaps, so long as Count de Money is satisfied with the Bottomlined profits.