Some of the newer Hynix A-Die kits are able to push CL30 at sub-6000 Mhz. I was able to push mine to 6600 at 30-39-39-30 with nearly the same latency as my Ryzen 5950x with DDR4 3600 CL14. Latency was measured outside safe mode, so basically around 60ns once background apps are removed.
