M386AAG40BM3-CWELY Samsung 128GB 3200MBPS Pc4-25600 Ecc Registered 2rx4 Cl22 1.1v Ddr4 Sdram 288-pin Rdimm Memory Module. New Sealed in Box (NIB)

Highlights of Samsung M386AAG40BM3-CWELY 128GB DDR4 Ram

The Samsung M386AAG40BM3-CWELY is a high-capacity enterprise-grade memory module designed for demanding server and workstation environments. Built with reliability, speed, and efficiency in mind, this 128GB DDR4 RDIMM ensures stable performance for data centers, virtualization platforms, and mission-critical workloads.

General Information

• Brand: Samsung
• Model Number: M386AAG40BM3-CWELY
• Product Category: Server Memory Module
• Memory Type: DDR4 SDRAM

Technical Specifications

• Total Capacity: 128GB
• Module Configuration: 1 x 128GB
• Memory Speed: 3200Mbps
• Standard: DDR4-3200 / PC4-25600
• Error Checking: ECC (Error-Correcting Code)
• Signal Type: Registered (Buffered)
• Latency: CL22
• Rank Structure: 2Rx4
• Optimized For: High-density server platforms
• Module Type: RDIMM
• Pin Count: 288-Pin
• Operating Voltage: 1.1V

Shipping & Packaging Details

• Shipping Height: 1.00 Inch
• Shipping Depth: 6.75 Inch
• Approximate Weight: 0.20 lb

Compatibility

Dell PowerEdge Server Compatibility

• Dell PowerEdge R750
• Dell PowerEdge R650
• Dell PowerEdge R740
• Dell PowerEdge R740xd
• Dell PowerEdge R760 (DDR4 configurations)

Dell Equivalent Memory Codes

• SNP7YDC8C/128G
• SNP8N6XC/128G

HPE ProLiant Server Compatibility

• HPE ProLiant DL380 Gen10
• HPE ProLiant DL380 Gen10 Plus
• HPE ProLiant DL360 Gen10
• HPE ProLiant ML350 Gen10

HPE SmartMemory Reference Codes

• P07646-B21
• P07646-001

Lenovo ThinkSystem Compatibility

• ThinkSystem SR650
• ThinkSystem SR630
• ThinkSystem SR670

Lenovo FRU / Option Codes

• 4X77A08633
• 4X77A77495

Supermicro Server Compatibility

• Supermicro X12DPG-QT6
• Supermicro X12SPM-TF
• Supermicro X12DPi-N6

Supermicro Memory Reference

• MEM-DR412L-SL01-ER32

Overview of Samsung M386AAG40BM3-CWELY DDR4 3200MBPS

The Samsung M386AAG40BM3-CWELY 128GB DDR4 memory module belongs to the enterprise-class registered DIMM category, designed specifically for high-density server and workstation environments that require stability, scalability, and sustained performance under continuous workloads. This category focuses on ECC Registered DDR4 SDRAM modules that support modern data centers, virtualization platforms, cloud infrastructures, database servers, and mission-critical enterprise applications. Built on Samsung’s advanced DRAM manufacturing process, this memory category emphasizes reliability, signal integrity, and compatibility with industry-standard server platforms.

High-Density 128GB Capacity for Scalable Systems

The 128GB capacity places this memory module in the ultra-high-density RDIMM subcategory, targeting systems that demand extensive memory footprints. Enterprise servers running virtualization, container orchestration, large-scale analytics, and in-memory databases benefit significantly from higher per-DIMM capacities. With fewer memory slots required to reach terabyte-scale configurations, system builders gain flexibility in server design while maintaining optimal airflow and power efficiency.

2Rx4 Dual-Rank Organization Benefits

The dual-rank 2Rx4 configuration is a defining characteristic of this memory category. Dual-rank modules effectively present two independent memory ranks to the memory controller, improving memory interleaving and throughput. The x4 DRAM chip layout enhances error detection and correction efficiency, which is particularly valuable in enterprise environments where data integrity is critical.

DDR4-3200 Performance and PC4-25600 Bandwidth

Operating at 3200 megatransfers per second, this memory module belongs to the DDR4-3200 performance tier, also known as PC4-25600. This category represents the upper performance range of DDR4 technology widely adopted in modern servers before transitioning to DDR5. The higher data transfer rate allows servers to handle data-intensive workloads with improved responsiveness and throughput. PC4-25600 bandwidth is particularly beneficial for applications that depend on rapid memory access, such as virtualization hosts running multiple virtual machines, real-time analytics engines, and high-performance computing tasks.

Modern Server CPUs

This category of memory is designed to be fully compatible with server processors from Intel Xeon Scalable platforms and AMD EPYC architectures that support DDR4-3200 RDIMM configurations. The Samsung M386AAG40BM3-CWELY aligns with JEDEC standards, ensuring seamless interoperability with enterprise-grade motherboards and chipsets. In multi-socket environments, maintaining consistent memory speed across all channels is essential for predictable performance. This module supports uniform 3200 MT/s operation when paired with compatible CPUs, enabling balanced memory access and reduced latency across NUMA nodes.

ECC Registered Memory for Data Integrity

Error Correcting Code functionality is a core attribute of this memory category. ECC memory detects and corrects single-bit errors while identifying multi-bit errors, significantly reducing the risk of data corruption. In enterprise servers where uptime and data accuracy are non-negotiable, ECC Registered DDR4 memory is a foundational requirement. The Samsung M386AAG40BM3-CWELY integrates advanced ECC capabilities at the hardware level, ensuring that transient memory errors caused by electrical interference, cosmic radiation, or component aging do not compromise system reliability.

Registered Buffer for Enhanced Signal Integrity

The registered buffer incorporated into RDIMM modules plays a critical role in maintaining signal integrity across densely populated memory channels. By re-driving command and address signals, the register reduces electrical stress on the memory controller, allowing for higher module counts per channel. This design characteristic enables enterprise servers to scale memory configurations without sacrificing stability. The Samsung M386AAG40BM3-CWELY exemplifies the RDIMM category’s ability to support large memory footprints while maintaining consistent signal quality, even in fully populated server configurations.

Low Power Consumption at 1.1V

Operating at a reduced voltage of 1.1V, this DDR4 memory module aligns with energy-efficient server design principles. Lower operating voltage directly translates into reduced power consumption and heat generation, which are critical factors in large-scale data center environments. This category of low-voltage DDR4 RDIMM memory supports enterprise sustainability goals by reducing overall energy usage while maintaining high performance. The Samsung M386AAG40BM3-CWELY enables organizations to optimize total cost of ownership by lowering cooling requirements and power draw per server node.

Dense Server Deployments

High-density memory modules generate significant thermal loads, particularly in servers with multiple populated DIMM slots. The low-voltage operation of this module helps mitigate thermal challenges, ensuring stable performance under sustained workloads. Thermal efficiency is especially important in blade servers, hyper-converged infrastructure, and rack-mounted systems where airflow is constrained. This memory category supports reliable operation in such environments by balancing performance and power efficiency.

288-Pin RDIMM Form Factor

The standard 288-pin RDIMM form factor ensures broad compatibility across enterprise server platforms. This memory category adheres strictly to JEDEC specifications, allowing seamless integration into certified server motherboards without the need for custom configurations. The physical design of the Samsung M386AAG40BM3-CWELY supports secure installation and stable electrical connections, minimizing the risk of installation errors. This consistency is essential for data center technicians managing large-scale deployments and routine maintenance operations.

Server-Only Memory Classification

This category of memory is explicitly designed for servers and is not compatible with consumer desktop systems. RDIMM modules require memory controllers that support registered memory, which are found exclusively in server-grade CPUs and motherboards. By focusing on server-only compatibility, this memory category ensures that all design considerations are optimized for enterprise workloads, including reliability, longevity, and sustained performance under continuous operation.

Samsung DRAM Manufacturing Excellence

Samsung is a global leader in semiconductor manufacturing, and this memory module reflects the company’s commitment to quality and innovation. The Samsung M386AAG40BM3-CWELY is manufactured using advanced DRAM process technologies that deliver consistent performance and long-term reliability. This category benefits from Samsung’s rigorous testing, validation, and quality control processes. Enterprise customers rely on Samsung memory for its proven track record in mission-critical environments, where component failure can result in significant operational disruptions.

Lifecycle Stability and Long-Term Availability

Enterprise memory categories prioritize long lifecycle availability to support consistent server configurations over extended periods. The Samsung M386AAG40BM3-CWELY is designed for long-term deployment, enabling organizations to maintain homogeneous memory configurations across server fleets. This stability simplifies procurement, maintenance, and capacity planning, particularly for enterprises operating global data centers with standardized hardware platforms.

Latency Characteristics and CL22 Timing

With a CAS latency rating of CL22, this DDR4-3200 memory module balances performance and stability within enterprise environments. Latency characteristics in this category are optimized for sustained workloads rather than short burst performance, ensuring predictable response times under heavy load. CL22 timing is well-suited for server applications that prioritize throughput, concurrency, and reliability. The Samsung M386AAG40BM3-CWELY delivers consistent latency behavior, which is critical for applications that depend on deterministic performance.

Memory Timing for Workloads

Enterprise workloads often involve large data sets and parallel processing, where memory access patterns differ from consumer applications. This memory category is optimized to handle such workloads efficiently, maintaining stable timings across varying operational conditions. The combination of CL22 latency and high bandwidth ensures that servers can process complex tasks without memory becoming a limiting factor.

Cloud Infrastructure Readiness

This category of high-capacity DDR4 RDIMM memory is ideally suited for virtualization and cloud computing environments. Virtualization platforms benefit from large memory pools that allow higher virtual machine density per host, reducing hardware sprawl and improving resource utilization. The Samsung M386AAG40BM3-CWELY supports virtualization technologies by providing ample memory capacity, ECC protection, and stable performance. Cloud service providers and private cloud deployments rely on such memory modules to deliver consistent service levels to end users.

Containerization and Microservices

Modern application architectures based on containers and microservices demand flexible and scalable memory resources. This memory category enables servers to support a large number of containers simultaneously without memory contention. High-density RDIMM modules reduce the need for frequent memory upgrades, allowing infrastructure teams to adapt quickly to changing workload demands.

Database, Analytics Workload

Memory-intensive applications such as relational databases, big data analytics platforms, and AI inference engines benefit significantly from high-capacity, high-bandwidth memory modules. This category supports in-memory processing models that reduce latency and improve overall system responsiveness. The Samsung M386AAG40BM3-CWELY enables enterprises to keep larger data sets resident in memory, accelerating query performance and analytical processing. AI workloads that require rapid access to large model parameters also benefit from the expanded memory capacity.

In-Memory Computing Advantages

In-memory computing frameworks rely on large RAM capacities to deliver real-time insights and transactional performance. This memory category is foundational for such architectures, providing the reliability and capacity needed for continuous operation. By minimizing reliance on secondary storage, organizations can achieve faster processing times and improved user experiences.

Reliability, Availability, and Serviceability Focus

Enterprise memory categories emphasize reliability, availability, and serviceability to meet stringent uptime requirements. The Samsung M386AAG40BM3-CWELY is designed to operate continuously under heavy workloads, supporting enterprise service-level agreements.Features such as ECC protection, registered buffering, and robust manufacturing standards contribute to reduced failure rates and easier troubleshooting. This category supports proactive maintenance strategies and predictable performance throughout the server lifecycle.

Mission-Critical Deployment Readiness

Servers deployed in financial services, telecommunications, government, and healthcare environments require memory components that can be trusted under all conditions. This memory category meets those demands by combining high capacity, error correction, and proven compatibility. The Samsung M386AAG40BM3-CWELY represents a dependable choice for organizations that cannot afford downtime or data integrity issues.