SSG-6049P-E1CR36H populated Samsung 64GB 2Rx4 PC4 2666V M393A8G40MB2 was working fine with BIOS 2.1 and Skylake processor Xeon 4116. After upgrading to BIOS 3.3, POST screen is showing the error "No memory Dimm detected".
Samsung 64GB 2Rx4 PC4 2666V M393A8G40MB2 is based on 16Gb M-die technology. BIOS 3.3 does not support it with Skylake processor. Only 2nd Xeon scalable processor can support it.