OWC 16GB DDR4 2933 CL21 1Rx4 288-pin 1.2V ECC Registered RDIMM 2R9D41R416GB

Server-grade ECC RDIMM for Cisco HX and C480 M5

This 16GB DDR4 2933 CL21 1Rx4 registered DIMM operates at 1.2V and is validated for Cisco HX220c M5, HX240c M5, HXAF220c M5, HX-E-220M5SX and C480 ML M5 servers. It replaces Cisco part numbers HXMRX16G1RTH and UCSMRX16G1RTH. The module is built for workstation and server platforms that require ECC registered memory and will not function in standard desktop systems or alongside unbuffered or load-reduced modules.

Steady-state reliability under continuous server

ECC registered operation corrects single-bit errors and reduces electrical load on the memory controller, maintaining data integrity during sustained compute, virtualization or storage tasks. The module runs at the native 2933 MT/s speed with CL21 timing and remains stable when the system down-clocks to 2666, 2400 or 2133 MT/s to match existing populated slots. JEDEC and RoHS compliance ensures consistent electrical behaviour across the full operating envelope.

Direct replacement for Cisco HXMRX16G1RTH

Install this module to expand capacity in supported Cisco M5 servers without mixing registered and unbuffered or load-reduced DIMMs. The upgrade is worthwhile when the platform demands ECC registered memory and the current configuration leaves DIMM slots available for a 16GB 1Rx4 module. Buyers who need unbuffered ECC, load-reduced DIMMs or desktop-compatible memory cannot use this part.