Samsung 128GB DDR4 2666MHz PC4-21300 ECC LRDIMM Memory Module

Overview

The Samsung M386AAK40B40-CWD is a high-capacity server memory module designed to deliver 128GB of DDR4 RAM running at 2666MHz with error-correcting code (ECC) and load-reduced DIMM (LRDIMM) technology. This module is engineered to enhance server performance by improving signal integrity and reducing power consumption, making it well suited for demanding enterprise environments that require large memory pools and reliable operation.

Its 288-pin form factor and 8Rx4 rank configuration allow for easy installation in compatible servers, while the 1.2-volt operation balances power efficiency with consistent bandwidth. This memory module supports workloads that depend on large in-memory datasets, such as virtualization, big data analytics, and complex simulations.

Key features

• Load-reduced design with onboard register and dedicated data buffer to maintain signal integrity across multiple modules
• ECC support to detect and correct memory errors, enhancing system stability and uptime
• High capacity of 128GB per module to expand memory pools significantly beyond standard RDIMMs
• Operates at a low voltage of 1.2V to reduce power consumption without compromising performance
• Compatible with servers that support 288-pin LRDIMM slots and ECC load-reduced memory
• 8Rx4 rank configuration optimized for high-density memory environments

Key specs

• Memory type: DDR4 ECC LRDIMM
• Capacity: 128GB
• Speed: 2666MHz (PC4-21300)
• Voltage: 1.2V
• Rank and organization: 8Rx4
• Pin count: 288-pin

Connectivity and compatibility

This memory module is designed specifically for servers and workstations that support ECC load-reduced DIMMs. It fits into standard 288-pin LRDIMM slots and is compatible with platforms that list support for PC4-21300 ECC LRDIMM memory. Its architecture allows up to three modules per memory channel, enabling substantial scaling of memory capacity in multi-channel server configurations.

Ideal uses and environments

The Samsung M386AAK40B40-CWD excels in environments where large memory capacity and reliability are critical. It is a strong choice for virtualization hosts that run multiple virtual machines, in-memory database servers requiring fast access to large datasets, big data analytics nodes processing complex information, and computing clusters performing simulations or scientific calculations. Its ECC and load-reduced design help maintain uptime and data integrity in mission-critical applications.