Actually, the DRAM makers and mobo makers basically gave up on 'standards' years ago because people want more performance and have worked hand in hand to improve things, The JEDEC Standards for DDR3 went up to 1600 sticks, the manufacturers took DRAM up to 1866, then 2133, then 2400 and had sticks at 2666 before JEDEC ever even issued 'standards' for 1866 and 2133, then they just sort of gave up. The DDR4 standards by JEDEC are simply a continuation from where DDR3 left off, and again the manufactures of DRAM and mobos to a degree have bypassed JEDEC, these early sticks 2133 and up follow the published 'standards' but they have ignored the entry of 1866, and we will be seeing the sticks w/ tighter timings once another line of mobos and CPUs come out that utilize DDR4