8 x Samung 64GB 2Rx4 DDR4-3200AA ECC RDIMM Server Memory RAM (M393A8G40AB2-CWE) For Sale
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8 x Samung 64GB 2Rx4 DDR4-3200AA ECC RDIMM Server Memory RAM (M393A8G40AB2-CWE):
$4999.00
Samsung M393A8G40AB2-CWE 64GB DDR4-3200 PC4-25600 2Rx4 ECC Registered RDIMM Server MemoryItem IntroductionUpgrade or expand a compatible enterprise server or professional workstation with the Samsung M393A8G40AB2-CWE 64GB DDR4-3200 ECC Registered DIMM (RDIMM).
The M393A8G40AB2-CWE is a high-capacity, server-class memory module providing 64GB of DDR4 SDRAM on a single 288-pin RDIMM. Designed for enterprise computing environments, this module combines DDR4-3200 performance, ECC error correction, Registered DIMM architecture, and a dual-rank 2Rx4 configuration.
With an effective rated transfer speed of 3200 MT/s, the module falls within the PC4-25600 performance class and may also be identified by the PC4-3200AA speed designation commonly found on enterprise DDR4 memory labels.
This is a true ECC Registered DIMM (RDIMM) intended for compatible servers and professional workstation platforms. Unlike conventional desktop DDR4 UDIMMs, Registered DIMMs incorporate register/buffer circuitry between the system memory controller and portions of the DIMM signaling path. This reduces electrical loading on the memory controller and enables enterprise platforms to support the large memory capacities and extensive DIMM populations required by professional and data-center workloads.
The module's ECC (Error-Correcting Code) functionality provides an additional level of data-integrity protection. When installed in a compatible ECC-capable server or workstation, ECC memory allows the system to detect and correct certain memory errors that could otherwise result in corrupted data, application instability, or system crashes.
Its 2Rx4 organization indicates a dual-rank module constructed using x4-organized DRAM devices—a configuration widely used in enterprise server memory.
At 64GB per DIMM, this module is particularly useful for systems requiring very large memory capacities. Multiple modules can be used in supported multi-channel server platforms to create memory configurations measured in hundreds of gigabytes or even terabytes.
Manufactured by Samsung Electronics, one of the world's largest DRAM manufacturers and a major supplier of OEM enterprise memory, the M393A8G40AB2-CWE is an excellent choice for replacing a matching module, expanding an existing server, building a virtualization host, or increasing memory capacity for demanding professional workloads.
Typical applications include virtualization, database hosting, enterprise storage, cloud infrastructure, scientific computing, engineering and simulation, rendering, data analytics, high-performance computing, professional workstations, and memory-intensive homelab servers.
Item FeaturesHigh-Capacity 64GB ModuleProvides an impressive:
64GB of DDR4 memory capacity on a single DIMM
This high density allows compatible enterprise platforms to achieve very large total memory configurations without requiring every DIMM socket to be populated with lower-capacity modules.
64GB RDIMMs are particularly useful for:
Virtualization hosts
Large databases
Enterprise applications
Cloud computing
Engineering analytics
Storage servers
High-performance computing
Professional homelab environments
The Samsung M393A8G40AB2-CWE is rated for:
DDR4-3200
with an effective data-transfer rate of:
3200 MT/s
DDR memory is frequently marketed using "MHz," so this module may also be described commercially as 3200MHz DDR4, although 3200 MT/s is the technically precise terminology for the effective data rate.
Actual operating speed depends on the processor, motherboard/server platform, BIOS/firmware, number of installed DIMMs, and memory-channel population.
PC4-25600 Performance ClassDDR4-3200 corresponds to the commonly used bandwidth designation:
PC4-25600
This represents approximately 25.6 GB/s of theoretical transfer bandwidth per 64-bit memory channel.
The module may additionally be identified using the JEDEC-style PC4-3200AA speed designation.
ECC Error-Correcting MemoryThe M393A8G40AB2-CWE is equipped with:
ECC – Error-Correcting Code
ECC memory provides additional data bits that allow a compatible memory controller to detect and correct certain memory errors.
This is particularly valuable in professional and enterprise environments where data integrity and system stability are important.
Common ECC applications include:
Database servers
Virtualization hosts
Storage servers
Scientific computing
Financial applications
Engineering systems
Enterprise computational workloads
ECC functionality requires support from both the processor and motherboard/server platform.
Registered DIMM ArchitectureThis module is a:
Registered DIMM (RDIMM)
Registered memory incorporates register/buffer circuitry for command and address signaling between the processor's memory controller and the DRAM devices.
Reducing the electrical load on the memory controller allows compatible server platforms to support larger numbers of DIMMs and substantially greater aggregate memory capacity than typical consumer desktop systems.
This architecture is widely used in enterprise servers and professional workstation platforms.
Dual-Rank 2Rx4 OrganizationThe M393A8G40AB2-CWE uses means:
2R = Dual Rank
x4 = x4 DRAM device organization
Rank and DRAM-device organization can be important when matching existing server memory or following a system manufacturer's DIMM population requirements.
288-Pin DDR4 RDIMM Form FactorThe module uses the standard:
288-pin DDR4 DIMM form factor
used by full-size DDR4 server memory.
Although standard desktop DDR4 UDIMMs also use a 288-pin physical format, RDIMMs and UDIMMs use different electrical architectures and should not be considered interchangeable.
The receiving motherboard must specifically support DDR4 Registered DIMMs.
Standard DDR4 1.2V ArchitectureDDR4 server memory of this class operates from the standard DDR4 1.2V nominal supply architecture.
DDR4's reduced operating voltage compared with earlier DDR3 technology is particularly beneficial in high-density enterprise systems where many memory modules may be installed simultaneously.
Samsung OEM Enterprise MemoryManufactured by Samsung Electronics, the M393A8G40AB2-CWE is an OEM/server memory module rather than an aftermarket consumer gaming-memory kit.
Samsung is one of the world's major DRAM manufacturers and supplies memory components and complete modules used throughout the enterprise server industry.
The exact Samsung manufacturer part number the complete manufacturer part number can be particularly useful when replacing or expanding an existing server-memory configuration.
Designed for High-Memory WorkloadsThe combination of:
64GB capacity
DDR4-3200 architecture
2Rx4 organization
makes this module particularly suitable for workloads requiring large amounts of reliable system memory.
Potential applications include:
VMware ESXi
Microsoft Hyper-V
Proxmox VE
KVM servers
Large in-memory databases
Cloud infrastructure
NAS/SAN systems
Engineering applications
Scientific analytics
Professional computing
Enterprise applications
The Samsung M393A8G40AB2-CWE is DDR4 ECC Registered memory (RDIMM).
It is NOT a standard desktop DDR4 UDIMM.
Before purchasing, verify that the intended system supports:
DDR4 SDRAM
Registered DIMMs / RDIMMs
ECC memory
64GB individual memory modules
2Rx4 organization where required
DDR4-3200 / PC4-25600 memory
DDR4 RDIMMs and DDR4 UDIMMs are not interchangeable simply because both use 288-pin DIMM form factors.
RDIMMs incorporate register circuitry that ordinary UDIMMs do not.
Standard consumer desktop motherboards generally support DDR4 UDIMMs rather than RDIMMs. The system must explicitly support ECC Registered DDR4 memory.
RDIMM vs. LRDIMMThis module is an:
RDIMM – Registered DIMM
It is not an LRDIMM – Load-Reduced DIMM.
Some enterprise server platforms support both technologies, but RDIMMs and LRDIMMs generally should not be mixed within the same memory configuration.
Always follow the server manufacturer's DIMM population requirements.
64GB Module SupportA system supporting DDR4 RDIMMs does not automatically guarantee support for every available RDIMM capacity.
Verify that the intended server or workstation supports:
64GB DDR4 RDIMMs
Some older DDR4 platforms may have restrictions based on DIMM density, processor generation, BIOS revision, or rank configuration.
Memory Speed CompatibilityThe module is rated for:
DDR4-3200 / 3200 MT/s
This is the module's maximum specified speed class and does not guarantee that every compatible system will operate it at 3200 MT/s.
Actual memory speed can be affected by:
CPU memory-controller of installed processors
Number of DIMMs per channel
Total memory population
Rank configuration
Other installed memory
For example, an otherwise compatible DDR4-3200 RDIMM installed in a server whose processor supports a maximum memory speed of DDR4-2933 may operate at 2933 MT/s.
Matching Existing MemoryWhen expanding an existing server, compare the replacement/upgrade module with the installed memory.
Important characteristics include:
DDR vs. LRDIMM vs. UDIMM
ECC part number
For applications requiring an exact replacement, match the complete Samsung part than relying solely on the 64GB capacity and DDR4-3200 speed.
Ideal ApplicationsThe Samsung M393A8G40AB2-CWE is particularly well suited for compatible systems used for:
Enterprise server memory upgrades
Replacement of failed server DIMMs
Data-center servers
VMware ESXi
Microsoft Hyper-V
Proxmox servers
Storage servers
NAS/SAN environments
Cloud hosting
Scientific computing
Engineering and analytics
Professional computing
Homelab servers
With its combination of 64GB capacity, DDR4-3200 / PC4-25600 performance, ECC protection, Registered DIMM architecture, 2Rx4 dual-rank organization, and Samsung OEM construction, the Samsung M393A8G40AB2-CWE provides a high-capacity enterprise memory solution for compatible DDR4 servers and professional workstation platforms.
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