NEMIX RAM 16GB DDR4 2933 ECC RDIMM CL21 2Rx8 1.2V 288-Pin memory upgrade

Lenovo ThinkSystem DDR4 2933 ECC RDIMM

This 16 GB registered DDR4 module runs at 2933 MT/s with CL21 latency and 1.2 V operation. It uses a 2Rx8 organisation and 288-pin RDIMM form factor for Lenovo ThinkSystem servers based on Intel processors. The part number MR23400-628K1 matches Lenovo option 4ZC7A08708.

Registered ECC limits for DDR4 2933

Registered ECC RDIMMs add a register that buffers address and command signals, allowing higher capacities per channel but adding one cycle of latency. The DDR4 2933 standard caps transfer rate at PC4-23400 and requires motherboard support for registered modules and ECC. Unbuffered or non-ECC memory cannot be mixed with this module.

Single rank constraint 2Rx8

The 2Rx8 rank configuration determines how the memory controller addresses the 16 GB density across two ranks of x8 chips. Systems that only support single-rank modules or x4 organisation will not recognise the full capacity. Verify the server memory population rules before purchase.