SAMSUNG M393A4K40BB2-CTD 32GB DDR4 2666 ECC Registered CL19 1.2V 288-pin server RAM

32 GB DDR4-2666 ECC Registered Module

This Samsung DDR4-2666 registered DIMM delivers 32 GB of error-correcting memory for server and workstation platforms. The 288-pin form factor fits standard DDR4 slots, and the registered signal processing reduces electrical load on the memory controller. It operates at 1.20 V with a CL19 latency rating. This module targets administrators who need reliable, high-density capacity for virtualisation, database or compute workloads.

Capacity headroom and limits

A single 32 GB stick provides substantial headroom for multi-VM hosts, in-memory databases or large dataset processing before the platform hits its slot count ceiling. The 2Rx4 organisation balances density with signal integrity at 2666 MT/s. Workloads that exceed the installed module count or require speeds beyond DDR4-2666 will need additional DIMMs or a faster memory standard.

Build, connectors and daily implications

The module uses a standard 288-pin DDR4 DIMM edge connector and carries WEEE and China RoHS environmental certifications. Registered buffering and on-board ECC protect data integrity in continuous-operation environments. The 1.20 V operating voltage keeps power draw modest for dense configurations. Buyers needing non-ECC unbuffered memory for consumer desktop boards cannot use this module.