OWC 16GB DDR4 2933MHz CL21 ECC Registered RDIMM memory upgrade

Targeted Server Memory Upgrade

This 16GB DDR4 2933MHz ECC Registered RDIMM is built for Lenovo ThinkSystem servers using Xeon SP Gen 2 processors. It fits the SD530, SD650, SN550, SN850 and SR630 models and replaces Lenovo part numbers 01AG631, 4ZC7A08708 and 4ZC7A08741. The module runs at 1.2V with CL21 latency and uses a 288-pin 2Rx8 layout.

Capacity and Speed Headroom

A single 16GB stick adds substantial memory to multi-socket server configurations, supporting virtualisation workloads and large datasets. Rated at 2933MHz (PC4-23400), it also operates at 2666MHz, 2400MHz and 2133MHz when the platform requires a lower speed. ECC and register logic protect data integrity but add latency, so it will not suit unbuffered desktop boards or consumer laptops.

Upgrade Path and Compatibility Limits

The module directly replaces the three Lenovo part numbers listed above, letting you extend existing infrastructure or fill empty slots during a new build. It cannot be mixed with unbuffered memory and will not work in standard desktop PCs or non-ECC workstations. Buyers needing higher per-slot density or faster speeds must verify platform support before ordering.