This message was posted on behalf of Intel Corporation
Thank you very much for the information provided Herdo.
I can see that this board and the processor will support DDR4-2133MHz nonetheless, if possible, I will recommend using DDR4-2400Mhz to get the best performance for your system. I would like to add as well that the sticks of RAM require being either ECC or Non-ECC, the processor will only support one type.
I hope this answers all your questions.