I just tried with a Fury kit of HX318C10FRK2/16 (16GB DDR3-1866 CL10) and it indeed sets 1866 on auto (tested on a Z87 MPower Max w. i7 4770K). According to cpu-z spd is programmed with odd values (888Mhz = ddr3 1776). Most likely it forces ddr3 1866 w...
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