A-Tech 64GB DDR5 4800 ECC RDIMM 2Rx4 Hynix HMCG94AEBRA103N 108N 123N MEBRA102N 103N Server RAM

64GB DDR5 4800 ECC RDIMM

This 64GB DDR5 module operates at 4800MHz with ECC and registered buffering for server and workstation platforms. It replaces Hynix part numbers HMCG94AEBRA103N, HMCG94AEBRA108N, HMCG94AEBRA123N, HMCG94MEBRA102N and HMCG94MEBRA103N. The 2Rx4 organisation and 1.10V voltage match the original specifications. Systems requiring unbuffered memory or non-ECC operation cannot use this module.

288-pin RDIMM build and daily handling

The module uses a standard 288-pin DDR5 RDIMM form factor without a heat spreader, relying on chassis airflow for cooling. Registered signalling reduces electrical load on the memory controller, which is essential for multi-module configurations in dense servers. Installers must follow the system manual for correct slot population and channel guidelines to ensure stability. Buyers who need a low-profile heat spreader for restricted clearance should look elsewhere.

DDR5 4800 interface limits

The DDR5 4800 interface delivers a peak transfer rate of PC5-38400 with a CAS latency of 40. Bandwidth and latency are fixed by the JEDEC standard for this speed grade; higher throughput requires platform support for faster DDR5 speeds. ECC correction adds reliability for critical workloads but does not increase raw bandwidth. Systems limited to lower DDR5 data rates will downclock the module automatically.