This motherboard supports 1-1-1 memory channel configurations. Please populate the DCPMM memory in DIMM C1 and DIMM F1 for each processor. Then, populate DDR4 memory in DIMM A1, DIMM B1, DIMM D1 and DIMM E1 for each processor. As reference, the DCPMM memory population table for X11DPFF-SN is in the manual on page 40: https://www.supermicro.com/manuals/motherboard/C620/MNL-2147.pdf