Looking for some guidance.  We installed dual Intel 6242R CPUs with 24 x 32GB DDR4 2666MT/s ECC Registered memory inside our R640 server.  The memory is not showing up.  The memory is known good memory.  I am struggling to figure out why the memory would not be recognized.  The only thing I could think is the 6242R CPUs don't accept 2666MT/s speed RAM... but if they accept 2933 then they should accept 2666... but I just don't know.

Any guidance or ideas would be appreciated.

Thank you