OWC 64GB DDR4 2933MHz CL21 ECC Registered RDIMM 2Rx4 memory upgrade

Server-grade ECC RDIMM for Supermicro X11

This OWC 64GB DDR4 2933MHz CL21 module is a registered ECC RDIMM built for Supermicro X11SRi-IF, X11SRL-F, X11SRM-F and X11SRM-VF motherboards. It targets administrators upgrading workstation, server or NAS platforms that require registered memory with error correction. The single 64GB stick runs at 1.2V and uses a 2Rx4 organisation.

Registered ECC design prevents mixing

The registered buffer and ECC circuitry change how the memory controller is driven, so this module cannot be combined with unbuffered DIMMs in the same system. Backward compatibility with 2133MHz, 2400MHz and 2666MHz buses lets the stick clock down when installed alongside slower modules or on platforms that do not support the full 2933MHz data rate. No heat spreader is fitted, leaving the DRAM exposed for maximum airflow in dense chassis.

Verify motherboard model

Confirm the exact Supermicro X11 model listed above, because registered ECC RDIMMs are not compatible with standard desktop boards or consumer chipsets. Check how many 288-pin DDR4 slots remain free and whether the platform supports 2Rx4 ranks at the intended capacity per channel. The module replaces Supermicro part numbers MEMDR464LCL01ER29, MEMDR464LHL02ER29, MEMDR464LSL01ER29 and MEM-DR464MC-ER29.