M393A2K40DB2-CVF 16GB DDR4-2933 1Rx4 ECC RDIMM Server Memory

M393A2K40DB2-CVF

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Introduction

The Samsung M393A2K40DB2-CVF is a 16GB DDR4-2933 ECC Registered DIMM for server platforms that require a 288-pin, 1.2V RDIMM. Its defining specification is not only capacity and speed, but the 1Rx4 organization, which should be matched when replacing memory in an existing server BOM.

Samsung identifies the module as a single-rank design with a component composition of (2G x 4) x 18. That means the module is built from x4-width DRAM devices rather than the x8 devices used by many 2Rx8 16GB RDIMMs. For procurement teams, this is a useful physical-organization check when two modules appear similar on capacity and frequency alone.

The 1Rx4 topology can also matter for server RAS and qualification rules. Some platforms validate x4 and x8 RDIMMs separately or apply different advanced memory-protection modes depending on DRAM device width. Compatibility therefore should be confirmed against the server QVL, processor memory controller, BIOS level, DIMMs-per-channel rules, and the organization of modules already installed.

At 2933 MT/s, the module fits DDR4-2933 server configurations without requiring a 3200 MT/s replacement simply because newer stock is available. Its CL21 timing, registered signal buffering, and ECC capability make it appropriate for compatible systems where an exact 16GB 1Rx4 DDR4-2933 specification is required.

For customers sourcing this exact server-memory configuration, we at Huaying Hengtong provide product sourcing, server memory solutions, and configuration assistance for enterprise computing requirements.

Samsung currently lists M393A2K40DB2-CVF as an end-of-life product. For maintenance, expansion, or like-for-like replacement projects, buyers should therefore verify the full part number, rank organization, label information, and available stock condition rather than treating any 16GB DDR4 RDIMM as equivalent.

Specifications

Product Model	M393A2K40DB2-CVF
Memory Type	DDR4
Module Type	Registered DIMM / RDIMM
Application	Server
Capacity	16GB
Memory Speed	2933 MT/s
Speed Classification	DDR4-2933 / PC4-23400
Memory Organization	1Rx4
Component Composition	(2G x 4) x 18
Error Correction	ECC Supported
CAS Latency	CL21
Operating Voltage	1.2V
Form Factor	288-pin DIMM

Key Product Features

Single-Rank 1Rx4 Topology

M393A2K40DB2-CVF uses one addressable rank built with x4 DRAM devices. This distinguishes it from 16GB 2Rx8 alternatives and makes rank count plus device width important checks when matching an installed memory population.

(2G x 4) x 18 Component Composition

Samsung specifies a (2G x 4) x 18 component layout for this model. That exact organization is a stronger BOM identifier than “16GB DDR4” alone and can help buyers screen visually similar RDIMMs before deployment.

DDR4-2933 and CL21 Operating Profile

The module combines a 2933 MT/s transfer rate, CL21 timing, 1.2V operation, and a 288-pin registered interface. Actual operating speed still depends on the processor generation, memory channels, and population rules of the host server.

Exact-Part Replacement for Existing Server BOMs

Because this part is EOL, its value is often in maintaining a validated configuration rather than changing memory architecture. When replacing failed or missing DIMMs, matching M393A2K40DB2-CVF, 1Rx4 organization, speed class, and RDIMM/ECC type reduces the risk of an unintended topology change.

The M393A2K40DB2-CVF is best considered as a specific 16GB DDR4-2933 1Rx4 server-memory BOM item. Its single-rank x4 architecture, documented 18-device composition, and EOL sourcing context give it a distinct role from 2Rx8 or DDR4-3200 modules that share the same nominal capacity.