https://www.pcgamer.com/gskill-just-took-extreme-ram-to-the-next-level-with-a-ddr4-5066-memory-kit/

From a technology standpoint, it was a big deal when memory makers pushed past 4GHz, which is still considered extremely fast for a DDR4 kit. G.Skill has been testing the limits of DDR4, however, and is currently showcasing a range of performance kits at Computex, the fastest of which is a Trident Z RGB 16GB (2x8GB) DDR4-5066 kit.

"Chasing after the fastest possible memory speed, G.Skill once again breaks the limits and presents the Trident Z RGB DDR4-5066MHz extreme dual-channel kit built with Samsung 8Gb ICs, which is the highest frequency dual-channel memory on live demo display at Computex 2018," G.Skill said.