Production and its kinda new to ryzen am4.

Seeing as a .25 multi gives you 25 mhz and that can make or break stability on an oc with these chips ( yes its that fine of a line) 101x40 gets you 4040 mhz.. So even a multiplier is finer grain than Zens ref clock.

So 100.20 is much finer grain control and one point of having a chip.