Samsung M386AAG40DM3-CWE 128GB 3200MBPS PC4-25600 DDR4 SDRAM 288-pin Memory Module for Server

Highlights of Samsung M386AAG40DM3-CWE 128GB DDR4 Ram

The Samsung M386AAG40DM3-CWE is a high-density load-reduced memory module engineered for enterprise servers and data center environments. Designed to support intensive workloads, this 128GB DDR4 LRDIMM delivers improved signal integrity, scalable performance, and dependable operation for modern server infrastructures.

General Information

• Manufacturer Samsung
• Part Number: M386AAG40DM3-CWE
• Product Type: Server Memory Module
• Sub Type: DDR4 SDRAM PC4-25600

Technical Specifications

• Total Capacity: 128GB
• Module Setup: 1 x 128GB
• Rank Structure: 4Rx4
• Memory Speed: 3200Mbps
• Standard: DDR4-3200 / PC4-25600
• CAS Latency: CL22
• Error Correction: ECC (Error-Correcting Code)
• Signal Type: Registered
• Improved Load Management: LRDIMM Technology
• Operating Voltage: 1.2V
• Module Type: LRDIMM
• Pin Configuration: 288-Pin
• Server Compatibility: Enterprise and data center platforms

Shipping & Packaging Information

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

Supported Server Manufacturers

Dell PowerEdge Server Compatibility

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

Dell Equivalent Memory Part Numbers

• SNP7YDC8C/128G
• SNP9GMDXC/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

• Lenovo ThinkSystem SR650
• Lenovo ThinkSystem SR630
• Lenovo ThinkSystem SR670

Lenovo FRU / Option Numbers

• 4X77A08635
• 4X77A77496

Supermicro Server Compatibility

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

Supermicro Memory Reference

• MEM-DR412L-SL01-LR32

Overview of Samsung M386AAG40DM3-CWE DDR4 3200MBPS

The Samsung M386AAG40DM3-CWE 128GB DDR4 memory module belongs to the enterprise-grade Load Reduced DIMM category, a specialized segment of server memory designed to support extremely high memory capacities with exceptional electrical stability. LRDIMM technology is engineered for large-scale servers that require maximum memory density per socket while maintaining reliable signal integrity across heavily populated memory channels. This category is widely adopted in enterprise data centers, cloud infrastructure platforms, high-performance computing systems, and mission-critical server deployments.

128GB High-Density Memory Capacity for Advanced Workloads

The 128GB capacity positions this memory module within the ultra-high-density LRDIMM subcategory, designed for servers that require extensive memory footprints. Enterprise applications such as large-scale virtualization, in-memory databases, artificial intelligence workloads, and big data analytics demand vast amounts of RAM to operate efficiently. This category enables organizations to deploy fewer DIMMs to achieve multi-terabyte memory configurations, simplifying system architecture and improving overall efficiency.

Quad-Rank 4Rx4 Architecture Advantages

The 4Rx4 quad-rank organization is a defining feature of this memory category. Quad-rank modules present four independent memory ranks to the memory controller, enabling higher memory density and improved parallelism in data access. The x4 DRAM chip layout enhances error management and aligns with enterprise-grade memory design principles. In large server systems, quad-rank memory improves memory interleaving and throughput, particularly in workloads that involve multiple concurrent processes.

DDR4-3200 Performance and PC4-25600 Bandwidth Class

Operating at 3200 megatransfers per second, this memory module belongs to the DDR4-3200 performance tier, also identified as PC4-25600. This category represents one of the highest officially supported DDR4 data rates for enterprise servers, offering substantial improvements in memory bandwidth over earlier DDR4 generations. PC4-25600 bandwidth is critical for modern server workloads that rely on rapid data movement between processors and memory. Applications such as virtualization hosts, real-time analytics engines, and high-throughput transaction processing systems benefit from increased memory bandwidth, which reduces bottlenecks and improves overall system responsiveness.

Modern Server Processors

This category of DDR4 LRDIMM memory is designed to be compatible with enterprise server processors that support load reduced DIMM configurations, including select Intel Xeon Scalable and AMD EPYC platforms. The Samsung M386AAG40DM3-CWE adheres to JEDEC standards, ensuring predictable interoperability with certified server motherboards. When deployed in supported systems, DDR4-3200 LRDIMM modules allow servers to maintain high memory speeds even with maximum DIMM population. This consistency is essential for maintaining balanced performance across multi-socket architectures and NUMA-aware applications.

Load Reduced DIMM Technology and Signal Integrity

LRDIMM technology is specifically engineered to address the signal integrity challenges associated with high-capacity memory configurations. By isolating the electrical load of the DRAM chips from the memory controller, LRDIMM modules enable servers to support higher rank counts without compromising stability. The Samsung M386AAG40DM3-CWE integrates an advanced isolation memory buffer that re-drives data signals, significantly reducing signal degradation. This design allows enterprise servers to populate all available memory slots with high-capacity modules while maintaining reliable operation.

Scalability Benefits Over RDIMM

Compared to traditional registered DIMMs, LRDIMM modules provide superior scalability in terms of maximum supported memory per system. This category is ideal for servers that require extreme memory capacities, such as database servers, analytics platforms, and large virtualization clusters. By enabling higher memory densities, the Samsung M386AAG40DM3-CWE allows organizations to consolidate workloads onto fewer physical servers, reducing hardware footprint and operational complexity.

Standard 288-Pin LRDIMM Form Factor

The 288-pin form factor is the industry standard for DDR4 server memory, ensuring broad compatibility across enterprise server platforms that support LRDIMM technology. This category adheres strictly to JEDEC mechanical and electrical specifications, facilitating seamless integration into certified systems. The physical design of the Samsung M386AAG40DM3-CWE ensures secure seating in DIMM slots and reliable electrical contact, which is essential for maintaining stable operation in densely populated server configurations.

Server-Exclusive Memory Classification

This category of memory is designed exclusively for server and workstation platforms that explicitly support load reduced DIMMs. LRDIMM modules are not compatible with consumer desktop systems or standard unbuffered memory slots. By focusing solely on server environments, this memory category prioritizes reliability, longevity, and continuous operation under enterprise workloads.

Operating Voltage Characteristics

The Samsung M386AAG40DM3-CWE operates at a nominal voltage of 1.2V, which is standard for DDR4 LRDIMM modules. While slightly higher than some low-voltage RDIMM variants, this voltage level supports the additional buffering and isolation circuitry required for load reduced operation. This category balances power consumption and performance, ensuring stable operation in high-capacity memory configurations. Data centers benefit from predictable power characteristics that simplify thermal management and capacity planning.

Thermal Stability in Dense Server Deployments

High-capacity LRDIMM modules generate additional heat due to their complex buffering components and increased DRAM density. This memory category is engineered to maintain thermal stability under sustained workloads, supporting continuous operation in rack-mounted and blade server environments. The Samsung M386AAG40DM3-CWE is suitable for deployment in servers with advanced cooling solutions, ensuring consistent performance even when all memory slots are populated.

Samsung DRAM Engineering and Manufacturing Quality

Samsung is a global leader in semiconductor manufacturing, and this memory module reflects the company’s expertise in enterprise DRAM design. The Samsung M386AAG40DM3-CWE is produced using advanced manufacturing processes that ensure consistent quality, performance, and reliability. This category benefits from Samsung’s rigorous validation and testing procedures, which are designed to meet the demanding requirements of enterprise customers. Each module undergoes extensive quality control to ensure compliance with industry standards.

Enterprise Availability

Enterprise memory categories emphasize long-term availability and lifecycle stability to support standardized server deployments. The Samsung M386AAG40DM3-CWE is designed for extended production cycles, enabling organizations to maintain consistent memory configurations across server generations. This stability simplifies procurement and maintenance, particularly for large-scale data center operations that rely on uniform hardware platforms.

Latency Profile and Memory Timing Characteristics

This DDR4-3200 LRDIMM memory module is optimized for enterprise workloads that prioritize throughput and reliability over ultra-low latency. While latency values are secondary to capacity and stability in this category, the module delivers consistent and predictable timing behavior under heavy load. The Samsung M386AAG40DM3-CWE ensures stable memory access patterns across all ranks, supporting applications that require deterministic performance characteristics.

Workload-Oriented Memory

Enterprise applications often involve sustained memory access across large data sets, making consistent latency more important than peak performance. This memory category is designed to handle such workloads efficiently, minimizing performance variability. By maintaining stable timing characteristics, servers equipped with LRDIMM memory can deliver reliable performance across diverse application scenarios.

Cloud and Containerized Workloads

High-capacity LRDIMM memory is foundational for virtualization and cloud computing environments, where memory density directly impacts consolidation ratios. The Samsung M386AAG40DM3-CWE enables servers to host a larger number of virtual machines or containers without memory contention. This category supports modern hypervisors and container orchestration platforms by providing ample memory resources for dynamic workload allocation. Cloud service providers and private cloud deployments rely on such memory configurations to deliver scalable and predictable services.

Database, Analytics, and In-Memory Computing Applications

Memory-intensive workloads such as relational databases, NoSQL platforms, and big data analytics engines benefit significantly from high-capacity LRDIMM memory. This category supports in-memory data processing models that reduce reliance on disk-based storage. The Samsung M386AAG40DM3-CWE enables organizations to keep larger data sets resident in memory, improving query performance and reducing latency for data-intensive operations.

Reliability and Continuous Operation in Enterprise Systems

Enterprise memory categories are designed to support continuous, 24/7 operation in mission-critical environments. The Samsung M386AAG40DM3-CWE is built to withstand sustained workloads, thermal stress, and long operational lifecycles. Features such as advanced buffering, robust manufacturing standards, and strict compliance with JEDEC specifications contribute to reduced failure rates and improved system uptime.

Mission-Critical Deployment Readiness

Servers deployed in industries such as finance, healthcare, telecommunications, and government require memory components that can be trusted under all conditions. This memory category meets those requirements by combining high capacity, stable performance, and proven compatibility. The Samsung M386AAG40DM3-CWE represents a dependable solution for enterprise environments where reliability and scalability are essential.