https://www.pcgamer.com/a-professional-overclocker-cranked-a-gskill-ddr4-memory-kit-to-55ghz/

While companies were showing off new products at Computex, G.Skill was hosting its 7th annual OC World Record Stage, and the event did not disappoint. Over a dozen overclocking records were set, all using G.Skill memory, including the fastest DDR4 memory frequency to date.

Professional overclocker "Toppc" earned that particular one for G.Skill using the company's Trident Z RGB memory. He was able to push the RAM to a blazing fast 5,543MHz in an MSI Z370I Gaming Pro Carbon AC motherboard paired with an Intel Core i7-8700K processor.