NEMIX RAM 16GB DDR4 2666 ECC RDIMM CL19 1.2V 288-Pin Lenovo 78P4197 memory upgrade

Lenovo 78P4197 compatible DDR4 RDIMM

This 16 GB DDR4 2666 registered ECC module is built for Lenovo servers and workstations that require the 78P4197 part number. It suits administrators who need single-slot capacity increases without mixing ranks.

16 GB at CL19 2666 MHz with 1.20 V

The 1Rx4 organisation delivers 16 GB per DIMM, so a single module fills one slot and leaves remaining channels open for further expansion. Registered buffering and ECC protect data integrity under sustained multi-threaded workloads, while the 1.20 V operating voltage matches platform specifications. Headroom ends when the memory controller reaches its maximum supported DIMM count or total capacity per channel.

Replaces lower-capacity or non-ECC DDR4 RDIMMs

The jump is worthwhile when a system runs registered DDR4 at 2666 MHz and needs ECC protection or higher single-module density than 8 GB sticks provide. It is not for platforms that require unbuffered UDIMMs, load-reduced LRDIMMs, or speeds beyond 2666 MHz.