http://www.pcgamer.com/gskill-launches-worlds-fastest-so-dimm-memory-for-small-form-factor-pcs/

High frequency memory kits might be of limited real world value, but G.Skill isn't concerning itself with that. Instead, it keeps on kicking out premium RAM at record speed ratings, the newest of which takes aim at small form builds and other setups that use SO-DIMM memory. Its latest kit checks in at 3,800MHz, making it the fastest SO-DIMM memory on the planet.

This is a 32GB DDR4 memory kit consisting of four 8GB SO-DIMM modules. It is part of G.Skill's Ripjaws family, which is supposed to be a step down from the Trident Z and offer "classic performance." More recently, however, there has been a blurring of the lines between the different kits in G.Skill's stable.