https://www.techpowerup.com/303768/hicookie-and-gigabyte-achieve-ddr5-11316-memory-oc
 
Professional overclocker HiCookie and GIGABYTE partnered to smash the memory overclocking record out of the park, with a jaw-dropping DDR5-11316 memory OC (5567.5 MHz memory clock). This memory OC record was achieved in a single-channel (single module) configuration, on a GIGABYTE Z790 AORUS Tachyon motherboard that has a 1DPC (one DIMM per channel) memory slot topology; while the processor in charge was a Core i9-13900K. A single 16 GB GIGABYTE AORUS DDR5 memory module was used, and the DDR5-11316 speed was achieved at timings of 64-127-127-127-127, with 2T command-rate; although the DRAM voltage remains unknown. The CPUID validation can be found here, and the HWBOT listing here.
 
This is an incredible achievement.