OWC 32GB DDR4 2666MHz CL19 ECC Registered RDIMM 2Rx4 1.2V 288pin Lenovo ThinkSystem Xeon SP Gen 1

Server memory upgrade

This 32 GB DDR4 ECC registered DIMM runs at 2666 MHz with CL19 latency and 1.2 V operation. It is built for Lenovo ThinkSystem servers using Xeon SP Gen 1 processors, including the SD530, SD650, SN550, SN850 and SR530 models. The module uses a 2Rx4 organisation and replaces Lenovo part numbers 4X70P98203 and 7X77A01304. It will not work in standard desktop computers.

Thermals and power

Operating at the standard DDR4 voltage of 1.2 V keeps power draw low in dense server chassis. The module has no heat spreader, relying on the system’s directed airflow for cooling. Registered buffering reduces electrical load on the memory controller, which helps maintain signal integrity at full population. Noise remains unchanged because the DIMM adds no moving parts.

Registered ECC constraint

This memory is registered ECC DDR4 and cannot be mixed with unbuffered modules. Buyers who need unbuffered or non-ECC memory for a workstation or consumer board cannot use this part. It is also incompatible with any system that does not support registered DIMMs or the DDR4 2666 JEDEC standard. Backward compatibility with 2133 MHz and 2400 MHz platforms is supported.