Samsung M393ABG40M52-CAE 256GB 3200 DDR4

M393ABG40M52-CAE

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Introduction

The Samsung M393ABG40M52-CAE is a 256GB DDR4-3200 ECC Registered DIMM for compatible enterprise servers. Its high-density 8Rx4 organization makes it a special server memory module. Buyers should check more than capacity and speed. They need to do this before they use it as a replacement or expansion module.

Public supplier specifications list this model as a PC4-25600 registered RDIMM with ECC support. It has CL22 timing. It uses 1.2V operation. It comes in a 288-pin DIMM form factor. These details set it apart from lower-density DDR4 RDIMMs. They also separate it from LRDIMMs. They keep it distinct from unbuffered desktop or workstation modules that may share the same headline speed.

At 3200 MT/s, DDR4-3200 gives up to 25.6 GB/s of possible transfer bandwidth per 64-bit memory channel. Actual operating speed still depends on several factors. It depends on processor memory-controller support. It depends on BIOS qualification. It depends on DIMMs per channel and population order. It also depends on whether the system mixes modules with different ratings.

The 256GB capacity works well for virtualization hosts. It fits database servers. It suits analytics nodes and in-memory caching. It also fits dense compute platforms where memory size is often the main limit. Using fewer high-capacity DIMMs can help keep open slots for later expansion. This works when the platform supports the required rank and 3DS registered configuration.

This module is registered ECC server memory. It should be matched against the server vendor’s qualified memory list and population rules before installation. Compare module type, capacity, rank count, device width, speed grade, voltage, and part number. RDIMM, LRDIMM, and UDIMM technologies should not be mixed. The only exception is when the server documentation clearly allows the setup.

For exact-part sourcing, memory upgrade planning, and server memory compatibility, Huaying Hengtong can help customers compare Samsung server memory by model number, capacity, rank structure, module type, and target platform. This support covers virtualization server memory and database server memory as well.

Specifications

Product Model	M393ABG40M52-CAE
Memory Type	DDR4 SDRAM
Module Type	Registered DIMM / RDIMM
Application	Server
Capacity	256GB
Memory Speed	3200 MT/s
Speed Classification	DDR4-3200 / PC4-25600R
Memory Organization	8Rx4
Rank Structure	Octal-rank / 3DS registered
Error Correction	ECC Supported
CAS Latency	CL22
Operating Voltage	1.2V
Form Factor	288-pin DIMM

Key Product Features

256GB Capacity for Dense Server Configurations

M393ABG40M52-CAE provides 256GB DDR4 RDIMM capacity in a single module. For qualified platforms, this density helps raise total system memory. It does this without using every DIMM slot right away. The extra space is useful for virtualization server memory, database server memory, and data-processing environments.

8Rx4 Organization for Precise Compatibility Matching

The 8Rx4 memory organization is a main selection detail. It is more than a simple label. When replacing or expanding server memory, matching the rank and x4 device-width pattern is important. This match helps keep the installed configuration in line with the platform memory design. It also follows vendor validation rules for server memory module setups.

DDR4-3200 PC4-25600 Performance Class

The DDR4-3200 RDIMM speed class supports high memory bandwidth for multi-core server processors and parallel workloads. It carries a PC4-25600R rating. The CL22 memory and 1.2V DDR4 memory follow the common DDR4-3200 server-memory profile. But the final negotiated speed depends on the full system population.

Registered ECC Architecture for Enterprise Use

Registered ECC server memory is designed for server platforms that focus on stability, data integrity, and steady operation under continuous load. The registered design supports large memory configurations. ECC capability helps the host platform detect and correct supported memory errors during production workloads. This approach fits enterprise server memory needs.