OWC 128GB DDR4 2933 CL21 8Rx4 288-pin 1.2V ECC Registered RDIMM 2R9D48R4128G memory upgrade

System-Specific Server Memory

This OWC module delivers 128GB of DDR4 ECC registered memory rated at 2933 MT/s with CL21 latency. It is built for Lenovo ThinkSystem platforms including the SD530, SD650, SN550, SN850 and SR590 running second-generation Xeon Scalable processors. The single DIMM uses an 8Rx4 organisation and operates at the standard 1.2V.

Registered DIMM Build Requirements

The 288-pin registered design requires a motherboard that supports ECC registered DDR4 and cannot be mixed with unbuffered or load-reduced modules. Backward compatibility with 2133, 2400 and 2666 MT/s buses allows deployment in older slots without configuration changes. JEDEC and RoHS compliance ensures the upgrade keeps the original system warranty intact.

Sustained Workload Behaviour

Error-correcting code detects and corrects single-bit errors in real time, preventing silent data corruption during long compute runs. Registered buffering reduces electrical load on the memory controller, helping maintain signal integrity when all channels are populated at 2933 MT/s. The module runs without a heat spreader, relying on chassis airflow for thermal management under continuous load.