M386AAK40B40-CUC Samsung 128GB 2400MHz PC4-19200 DDR4 ECC Ram

Highlights of Samsung M386AAK40B40-CUC 128GB DDR4 Memory

The Samsung M386AAK40B40-CUC is a High-Capacity load-reduced memory module designed for enterprise servers and data center applications. With 128GB of DDR4 memory and 2400MHz speed, this LRDIMM ensures stable performance, high reliability, and efficient power consumption for memory-intensive workloads.

General Information

• Manufacturer: Samsung
• Part Number: M386AAK40B40-CUC
• Product Type: Server Memory Module
• Memory Interface: DDR4 SDRAM

Technical Specifications

• Total Capacity: 128GB
• Module Quantity: 1 x 128GB
• Rank Layout: Quad Rank 4Rx4
• Memory Speed: 2400MHz
• Standard: DDR4-2400 / PC4-19200
• CAS Latency: CL19
• Error Correction: ECC (Error-Correcting Code)
• Signal Processing: Registered (Buffered)
• Operating Voltage: 1.2V
• Memory Form Factor: LRDIMM
• Pin Configuration: 288-Pin
• Application: Enterprise-Grade

Shipping & Packaging Information

• Shipping Height: 1.00 Inch
• Shipping Depth: 6.75 Inch
• Shipping Weight: Approx. 0.20 lb

Compatibility

Dell PowerEdge Server Compatibility

• Dell PowerEdge R730
• Dell PowerEdge R730xd
• Dell PowerEdge R740
• Dell PowerEdge R740xd
• Dell PowerEdge R730 Rack Servers (DDR4-2400 supported)

Dell Equivalent Memory Part Numbers

• SNPJ6B6VC/128G
• SNPJ7C6MC/128G

HPE ProLiant Server Compatibility

• HPE ProLiant DL380 Gen9
• HPE ProLiant DL380 Gen10
• HPE ProLiant DL360 Gen9
• HPE ProLiant DL360 Gen10

HPE SmartMemory Reference Codes

• P06040-B21
• P06040-001

Lenovo ThinkSystem Compatibility

• Lenovo ThinkSystem SR650
• Lenovo ThinkSystem SR630
• Lenovo ThinkSystem SR550

Lenovo FRU / Option Numbers

• 4X77A77492
• 4X77A08630

Supermicro Server Compatibility

• Supermicro X10DRG-Q
• Supermicro X10DRi
• Supermicro X10SPM-TF

Supermicro Memory Reference Code

• MEM-DR412L-SL01-ER32

Overview Of Samsung M386AAK40B40-CUC DDR4 2400MHz

The Samsung M386AAK40B40-CUC 128GB DDR4 memory module belongs to the enterprise-grade Load Reduced DIMM (LRDIMM) category, specifically designed for high-capacity server environments that require maximum reliability, stability, and scalability. LRDIMM technology allows servers to achieve higher memory density per CPU socket than traditional RDIMMs by reducing the electrical load on the memory controller, enabling higher-rank configurations and large memory modules without sacrificing signal integrity. This category of memory is essential for modern data centers, cloud computing platforms, virtualization infrastructures.

High-Capacity 128GB Memory Modules

The 128GB capacity places this module in the ultra-high-density memory category, which is ideal for servers that handle memory-intensive workloads. Large-capacity LRDIMM modules allow enterprises to minimize the number of DIMMs needed to reach multi-terabyte configurations, simplifying server design, improving airflow, and reducing power consumption per unit of memory. Applications that benefit from this category include large-scale virtualization, in-memory databases, real-time analytics, and containerized cloud environments. The Samsung M386AAK40B40-CUC enables IT departments to deploy servers capable of handling extensive datasets and multiple concurrent workloads without performance degradation.

Quad-Rank X4 Architecture Advantages

This LRDIMM module features a quad-rank X4 organization, meaning it contains four independent memory ranks organized with x4 DRAM chips. Quad-rank memory improves parallelism in memory access, allows higher module capacity, and enhances memory interleaving for improved performance. The X4 DRAM layout further strengthens error correction capabilities, which is critical for enterprise environments where data integrity cannot be compromised. Quad-rank modules also optimize throughput in multi-socket server environments. Servers that support multiple CPU sockets can fully utilize the advantages of high-rank LRDIMM modules for applications that require consistent, high-bandwidth memory access.

DDR4-2400 Performance and PC4-19200 Bandwidth

The Samsung M386AAK40B40-CUC operates at a speed of 2400MHz, corresponding to the PC4-19200 bandwidth class. While this is not the highest DDR4 speed tier, it provides an excellent balance between throughput, latency, and stability for enterprise workloads. PC4-19200 modules deliver sufficient memory bandwidth for virtualized servers, database systems, and high-performance computing applications while maintaining compatibility with a broad range of server CPUs and motherboards. This category ensures that memory-intensive workloads, such as virtualization clusters and large-scale analytics applications, can achieve predictable performance without bottlenecks caused by insufficient memory bandwidth.

Modern Server Processors

LRDIMM modules like the Samsung M386AAK40B40-CUC are fully compatible with enterprise-class server processors, including Intel Xeon and AMD EPYC platforms that support DDR4 LRDIMM memory. This ensures reliable operation in certified server motherboards and supports balanced performance across all memory channels in multi-socket configurations. Servers equipped with LRDIMM memory benefit from uniform memory speed and predictable latency, which are crucial for applications that require deterministic memory access and low variability under heavy load.

ECC Registered Memory for Enhanced Reliability

Error-Correcting Code (ECC) memory is a hallmark of enterprise memory categories. ECC modules detect and correct single-bit memory errors and detect multi-bit errors before they impact system stability or data integrity. The Samsung M386AAK40B40-CUC combines ECC with registered signaling to provide an additional layer of reliability, ensuring that mission-critical servers can operate continuously without interruption. Enterprise applications that rely on ECC Registered memory include financial transaction processing, healthcare systems, cloud infrastructure, and database management.

Load Reduced Buffering and Signal Integrity

LRDIMM memory incorporates advanced buffering that reduces the electrical load on the memory controller. The register buffers command and address signals, while the isolation memory buffer manages data signals, improving signal integrity across multiple ranks and densely populated memory channels. This architecture allows servers to maintain stability while using high-capacity memory modules. The Samsung M386AAK40B40-CUC exemplifies the advantages of LRDIMM design by enabling reliable operation in configurations that push the limits of memory density and throughput in enterprise servers.

1.2V Operating Voltage

This DDR4 LRDIMM module operates at a nominal voltage of 1.2V, providing a balance between performance, reliability, and energy efficiency. Reduced operating voltage contributes to lower heat generation and reduced power consumption, which is critical in large-scale deployments where hundreds of memory modules may be operating simultaneously. Energy efficiency is a key consideration in modern data centers, and memory categories like this allow IT administrators to deploy high-capacity memory while controlling operational costs associated with cooling and power distribution.

Thermal Stability in High-Density Servers

High-capacity LRDIMM modules generate heat due to the number of DRAM chips and the buffering circuitry. The Samsung M386AAK40B40-CUC is designed to operate reliably under sustained workloads, even in dense server environments. Adequate thermal management ensures that performance remains consistent over extended periods, which is essential for mission-critical applications. This category supports deployment in rack-mounted servers, blade servers, and high-density computing clusters where heat dissipation is a critical design consideration.

288-Pin Form Factor and Enterprise

The 288-pin form factor is standard for DDR4 server memory, ensuring broad compatibility with enterprise server platforms that support LRDIMM technology. Compliance with JEDEC mechanical and electrical specifications simplifies deployment and ensures reliable operation in certified systems. The Samsung M386AAK40B40-CUC features a robust design for secure installation, reducing the risk of intermittent contact or operational failures in enterprise-grade servers. This standardization allows organizations to deploy uniform memory configurations across multiple servers for easier maintenance and management.

Server-Only Memory Classification

This LRDIMM memory category is designed exclusively for server and workstation applications and is not compatible with consumer desktop systems. By focusing solely on enterprise workloads, this category prioritizes reliability, long-term stability, and consistent performance under continuous operation.

Latency and CL21 Timing Characteristics

The Samsung M386AAK40B40-CUC has a CAS latency of CL21, providing balanced performance for enterprise applications. While lower-latency modules exist, this category emphasizes stability and predictability under heavy memory load, which is more critical for server environments than peak transient speeds. Consistent timing across all ranks and channels ensures reliable memory access for applications such as virtualization, in-memory databases, AI inference, and analytics workloads. This category supports deterministic performance, which is essential for enterprise servers operating under 24/7 conditions.

Sustained Workloads

Enterprise workloads often involve prolonged memory usage at high utilization. LRDIMM modules like the Samsung M386AAK40B40-CUC are designed to maintain consistent latency and performance under sustained load, ensuring predictable behavior in mission-critical environments. This optimization is key for IT teams managing large-scale deployments where reliability and uptime are paramount.

Cloud Infrastructure Enablement

High-capacity LRDIMM memory is crucial for virtualization and cloud computing, where memory density directly affects server consolidation and resource utilization. The Samsung M386AAK40B40-CUC enables servers to host a larger number of virtual machines or containers without memory contention, ensuring consistent performance for dynamic workloads. This memory category supports modern hypervisors and cloud platforms by providing large, reliable memory pools that can be allocated efficiently, allowing enterprises to scale resources as needed.

Database, Analytics, and In-Memory Processing

Memory-intensive workloads such as relational databases, big data analytics, and in-memory computing frameworks benefit significantly from this LRDIMM category. By enabling large datasets to reside entirely in memory, data access speeds increase, disk I/O is reduced, and overall application performance improves. The Samsung M386AAK40B40-CUC ensures that enterprise applications experience predictable, high-performance memory access, which is critical for transaction-heavy environments, real-time analytics, and AI workloads.

Samsung DRAM Manufacturing Quality

Samsung is recognized worldwide for excellence in semiconductor and memory manufacturing. The M386AAK40B40-CUC reflects the company’s commitment to high-quality, enterprise-grade memory. Each module undergoes rigorous validation and testing to ensure reliability, performance consistency, and compliance with enterprise standards. This memory category benefits from Samsung’s expertise in DRAM engineering, delivering modules that meet the demanding requirements of mission-critical server deployments.

Enterprise Availability

Enterprise memory categories emphasize extended lifecycle availability and consistent specifications to support standardized server deployments. The Samsung M386AAK40B40-CUC is designed to be available over long production cycles, allowing IT teams to maintain consistent memory configurations across multiple servers and over several years. Lifecycle stability ensures predictable procurement, reduces compatibility risks, and simplifies maintenance for large-scale enterprise environments.

Reliability, Availability, and Continuous Operation

LRDIMM memory is designed for continuous, 24/7 operation in demanding enterprise environments. Features such as ECC protection, quad-rank organization, and load-reduced buffering contribute to high reliability and low risk of memory-related downtime. The Samsung M386AAK40B40-CUC provides stable performance under full load and thermal stress, making it ideal for critical applications.

Deployment Readiness

Industries such as finance, healthcare, telecommunications, government, and research require memory solutions capable of performing reliably under all conditions. This LRDIMM category meets those requirements by combining high capacity, predictable performance, and robust error correction. The Samsung M386AAK40B40-CUC represents a trusted solution for enterprise servers that demand scalability, data integrity, and long-term operational confidence.