TweakTown reviewed the Trident Z Royal DDR4-4000 16GB Memory Kit
A quote from the article:
Once news broke about G.Skill's newest memory, we jumped to email them and shamelessly asked for a 16GB kit at 4600MHz. That request was denied due to a lack of that speeds availability, but was told that a package would be on the way.Trident Z Royal DDR4-4000 16GB Memory Kit Review