I have a theory

Both the CH6 and CH7 have a pre set section in the bios for different ram speeds for B-Die. This was developed between Asus and "the stilt". "The stilt" has a close relationship with "1usmus" (he developed the Ryzen Dram Calculator).
I think it is very likely the stilt and 1usmus have got together to develop a section in the bios of the CH8 that automatically reads the ram and sets the fastest or safest timings and subtimings to suit whatever ram is installed. Fastest or safest depending on user choice, much like Ryzen Dram Calculator.
I could be way off the mark here, but i don't think so