Comment by KingOfCoders

Bandwidth is currently limited by the infinity fabric implementation on consumer AMD CPUs, 6/8 core CPUs with s single CCD top out bandwidth quite early and improvements from higher clocks are minimal even from like 5600, assuming timings are overclocked similarly and beyond basic xmp/expo

See my top level post for more on this. It's not that there is no benefit to higher frequency memory on AM5, but that there is a penalty introduced above 6000 MT/s which isn't easily outweighed by further raising the memory speed.