SAMSUNG M393A8G40AB2-CWE 64GB DDR4 3200 RDIMM ECC 2Rx4

64GB DDR4 RDIMM for server workloads

This single 64GB DDR4 module runs at 3200MHz with ECC and registered buffering. It targets servers and workstations that require error correction and high capacity per slot. The dual-rank 2Rx4 organisation helps populate large memory configurations.

288-pin DIMM installs in keyed DDR4 slots

Alignment notches prevent backward insertion, so the module seats in one orientation only. Registered signalling adds electrical load, so the platform memory controller must support RDIMM operation. Mixing registered and unbuffered DIMMs on the same channel will prevent the system from posting.

CL22 latency at 3200MHz JEDEC standard

The module operates at the standard 1.2V with a CAS latency of 22 cycles. This timing is the primary figure that determines whether the memory matches the platform’s qualified vendor list. Buyers who need lower latency or higher frequency should verify platform support before ordering.