Did anyone mention there being a bug with 10% perfomance loss on the X570-E when combined with a ryzen 5000 cpu? i can not find in the comment anymore.
I am currently still waiting for my 5900 to get shipped which could be weeks but i already bought a X570 Strix E because it was a good deal...
I believe this is normal behavior when going for 4x dualrank, it just gets too straining on the memory controller.
XMP only works for 2x dual or 4x single, beyond that you will have to rely on manually raising the voltage