G.Skill announced that its latest Trident Z Royal Ram Set the new world record for frequency, which together with an Asus ROG Maximus XII Apex and an Intel Core i9-10900K reached 6666MHz. The module used was the F4-4000C18-8GTRG, part of the 2x8GB 4000MHz C18 kit from G.Skill Trident Z Royal line.
This record is backed by the Asus development team, which achieved this and several other records by testing its latest Apex. The special user who broke the record was bionbao, whose HWBOT validation can be found here.
As for the disk itself, 6665.4 MHz was specifically achieved, which CPU-Z specifies as DDR4-6666, obviously using liquid nitrogen on the processor to cool the memory controller and on the memories to raise the frequencies to the maximum possible level. When looking for the maximum frequency, the latencies should be as high as possible to avoid becoming a limitation. For this reason the latencies 31-63-63-3 were used, which is the maximum allowed by the motherboard.
If you are interested in seeing how the record was broken, we leave you this video.