OWC 128GB DDR4 2666 ECC Registered RDIMM CL19 8Rx4 1.2V 288-pin 2R6D48R4128G

Server-grade ECC RDIMM for Supermicro

This 128GB DDR4 2666 ECC Registered RDIMM is built for Supermicro H11 series motherboards including H11SSW-iN, H11SSW-NT, H11DST-B, H11DSU-iN and H11SSL-C. The single 288-pin module delivers 128GB capacity at PC4-21300 speed with CL19 latency and 1.2V operation. It is designed for servers, workstations and NAS systems that require registered ECC memory and will not work in standard desktop computers.

Thermals noise and power in normal use

The module operates at the standard 1.2V DDR4 voltage without a heat spreader, relying on server chassis airflow for cooling. Registered buffering reduces electrical load on the memory controller, contributing to stable power draw during typical multi-threaded workloads. JEDEC and ROHS compliance ensures consistent electrical characteristics across the operating temperature range. Backward compatibility with 2133MHz and 2400MHz systems allows deployment in mixed-speed configurations.

Behaviour under sustained load

ECC registered architecture corrects single-bit errors in real time, preventing data corruption during extended compute tasks such as virtualisation, database serving or scientific calculation. The 8Rx4 organisation provides high density per DIMM slot, maximising total system memory without increasing electrical loading. OWC tests every module in-house to verify long-term reliability under continuous operation. This memory cannot be mixed with unbuffered or load-reduced DIMMs.