I just did a quick look at ATs set up here is what I found
Corsair DDR4-2133 2x8
G.Skill DDR4-2133 2x8
G.Skill DDR3-1866 4x4
*Memory Timings used were the supported frequencies of each architecture,
except DDR3L vs DDR4 testing, which used DDR3-1866 C9.
For Skylake's DDR3L requirement, this was...