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

Overview

The Samsung M393AAK40B42-CWD is a 128GB DDR4 memory module designed specifically for enterprise servers requiring large memory capacity and reliable performance. Operating at 2666 MHz with ECC Registered DIMM technology, it ensures data integrity and stable operation in demanding environments such as virtualization, analytics, and database management. Its 288-pin interface and 1.2-volt power consumption make it a robust choice for server memory expansion.

Key features

• ECC Registered DIMM technology that detects and corrects single-bit errors automatically, enhancing data reliability during critical workloads
• High capacity 128GB module with an 8Rx4 layout that distributes memory across eight ranks to maintain signal integrity even in fully populated server configurations
• Register buffers clock, command, and control signals to reduce electrical load on the memory controller, supporting stable multi-channel performance
• Operates at a low voltage of 1.2 V to optimize power efficiency without sacrificing speed or stability
• Designed exclusively for servers supporting 128GB DDR4 2666 MHz RDIMM modules, ensuring compatibility with major server brands like Dell, HPE, Lenovo, and Supermicro
• Silent operation that integrates seamlessly into server environments, providing additional bandwidth and capacity without disrupting system noise levels

Key specs

• Capacity: 128 GB
• Memory type: DDR4 ECC Registered DIMM
• Speed: 2666 MHz (PC4-21300)
• Voltage: 1.2 V
• Pin count: 288-pin
• Rank: 8Rx4 (octal rank)
• Error correction: Integrated 8-bit parity for single-bit error detection and correction

Connectivity and compatibility

This memory module is compatible with enterprise servers that support 128GB 8Rx4 DDR4 2666 RDIMM configurations. It fits into standard 288-pin DIMM slots and is suitable for systems from leading manufacturers such as Dell, HPE, Lenovo, and Supermicro. Before installation, verifying compatibility with the server vendor’s qualified hardware list is essential to ensure optimal performance and stability.

Ideal uses and environments

The Samsung M393AAK40B42-CWD excels in data centers and enterprise environments where large memory pools are critical. It supports workloads like virtual machine consolidation, large-scale simulations, and database caching, helping servers handle growing data demands efficiently. This module is not intended for desktop or laptop use, nor for systems mixing ECC and non-ECC memory.