MTA72ASS8G72LZ-2G6R2 Micron 64GB DDR4 PC4-21300 Memory

High-Capacity DDR4 LRDIMM Memory Modules for Enterprise Systems

The MTA72ASS8G72LZ-2G6R2 Micron 64GB (1x64GB) DDR4 2666MHz PC4-21300 CL19 4Rx4 ECC Registered LRDIMM Memory Module is part of a specialized category of memory designed for performance-critical, data-intensive environments. These high-capacity Load-Reduced DIMMs (LRDIMMs) are engineered specifically to deliver advanced scalability, reliability, and bandwidth for enterprise-level servers and workstations.

Understanding the 4Rx4 ECC Registered LRDIMM Architecture

At the core of this memory module’s power lies its 4-rank by 4-bit (4Rx4) architecture, which enhances data reliability and density. Unlike standard UDIMMs or RDIMMs, LRDIMMs use a memory buffer to reduce electrical load on the memory controller, allowing more DIMMs per channel without sacrificing speed or stability.

Buffered Memory and Load Reduction

Load-Reduced DIMMs leverage a buffer chip that handles the data and address signals to minimize the load presented to the memory controller. This allows for better signal integrity and enables systems to populate more DIMMs per channel, ideal for high-density configurations. This is a key differentiator compared to Registered DIMMs (RDIMMs), which buffer only the control signals.

ECC (Error-Correcting Code) for Data Integrity

ECC technology in this module automatically detects and corrects single-bit errors and detects multi-bit errors. This is crucial in mission-critical environments where data corruption is unacceptable, such as databases, virtualization platforms, financial systems, and AI/ML workloads.

Technical Specifications and Performance Profile

The MTA72ASS8G72LZ-2G6R2 module operates at 2666MHz, supporting the PC4-21300 standard, and delivers a CAS latency of CL19. This results in a balanced profile of speed and stability for a wide range of enterprise applications.

Clock Speed and Bandwidth

Operating at 2666 million transfers per second (MT/s), this module provides a theoretical peak bandwidth of 21.3 GB/s per module. In servers with multiple DIMMs per channel (DPC), this can lead to exceptional overall throughput, supporting high I/O workloads.

Voltage Efficiency at 1.2V

The 1.2V power profile ensures lower power consumption and thermal output compared to older generations of DDR3 or higher-voltage DDR4 memory. This is especially beneficial in large-scale data centers where energy efficiency is a priority.

Compatibility and Platform Support

This Micron module is JEDEC-compliant and supports major server platforms from vendors like HPE, Dell EMC, Lenovo, Supermicro, and Cisco. It's compatible with Intel Xeon Scalable processors and AMD EPYC platforms that support DDR4 LRDIMM configurations.

Enterprise Use Cases for High-Capacity DDR4 LRDIMM

Virtualization and Cloud Computing

In virtualized environments, memory density and reliability are critical. The 64GB LRDIMM allows system architects to design configurations with hundreds of gigabytes or multiple terabytes of RAM to support high virtual machine (VM) density with minimal latency.

Database Servers and In-Memory Computing

Applications like Oracle, SQL Server, and SAP HANA benefit significantly from large memory footprints. The MTA72ASS8G72LZ-2G6R2 ensures high performance and responsiveness by allowing large portions of the database to reside entirely in memory.

Scientific and Engineering Simulations

Scientific computing environments such as computational fluid dynamics (CFD), molecular modeling, and seismic analysis often require multi-terabyte memory support. LRDIMMs like this module are essential for minimizing memory bottlenecks during complex simulations.

AI/ML and Big Data Workloads

AI training models and large-scale analytics workflows require immense memory bandwidth and capacity. This module supports rapid in-memory dataset processing, enabling faster model training and real-time analytics.

Micron's Commitment to Quality and Reliability

Micron, as a leading global memory manufacturer, subjects each server-grade module to extensive validation and testing. The MTA72ASS8G72LZ-2G6R2 is built using high-quality components and conforms to rigorous standards, offering long-term stability and compatibility in enterprise ecosystems.

Thermal Performance and Heatsinking

These modules are equipped with advanced thermal design to maintain optimal operating temperatures under full load. The integrated heat spreaders help in dissipating heat evenly, reducing the chances of thermal throttling.

Firmware and SPD Configuration

The Serial Presence Detect (SPD) EEPROM on this module contains detailed information, including manufacturer ID, part number, timing tables, and voltage data, ensuring plug-and-play recognition in compliant systems.

Advantages of Deploying 64GB LRDIMM in Multi-Channel Memory Architectures

Maximizing Memory Bandwidth

By populating all memory channels with identical high-capacity LRDIMMs, system integrators can achieve maximum theoretical bandwidth and optimal NUMA (Non-Uniform Memory Access) alignment. This enhances parallel performance in multi-core and multi-socket server environments.

Improved Signal Integrity and Stability

The buffer in LRDIMMs isolates electrical loads from the memory controller, thereby improving signal integrity and reducing noise. This results in a lower chance of signal degradation, especially important in configurations involving multiple DIMMs per channel.

Scaling to Terabytes of Memory

Using 64GB LRDIMMs enables server platforms to scale to 1TB or more of memory using just a few memory slots. This is vital for space-constrained chassis or blade servers that cannot physically accommodate a large number of modules.

Why Choose PC4-21300 DDR4 2666MHz Over Other DDR4 Categories?

The PC4-21300 classification indicates a DDR4 module operating at 2666MHz with a data transfer rate of 21.3GB/s. It strikes a balance between speed and cost-effectiveness, outperforming 2133MHz or 2400MHz alternatives while maintaining compatibility with a wide range of server chipsets.

Latency and Timing Profile: CL19

The CAS Latency (CL) of 19 provides predictable access timing, minimizing read/write delays during memory operations. This timing profile is optimized for systems that require both reliability and responsiveness under continuous workload stress.

Power Consumption and Heat Dissipation

Running at 1.2V reduces the total power draw of the memory subsystem and lowers heat output. In data centers with dozens or hundreds of servers, this can result in measurable energy savings and reduced cooling costs.

Comparing LRDIMM vs RDIMM and UDIMM for Enterprise Use

Load Capability and Module Density

LRDIMMs surpass RDIMMs in load handling and memory density capabilities. While RDIMMs are limited in how many DIMMs per channel can be installed before electrical loading becomes a bottleneck, LRDIMMs can support more modules thanks to their memory buffer.

ECC Support Across Form Factors

All three types – UDIMM, RDIMM, and LRDIMM – support ECC in their server variants. However, LRDIMMs maintain higher reliability under larger memory footprints due to their enhanced signal management and lower bus load.

Use Case Optimization

While UDIMMs are typically reserved for entry-level servers or workstations, and RDIMMs serve mid-tier applications, LRDIMMs like the MTA72ASS8G72LZ-2G6R2 are the go-to solution for high-performance computing (HPC), large-scale virtualization, and memory-intensive workloads.

Physical Attributes and Installation Notes

The module adheres to the standard 288-pin form factor and is compatible with DDR4 DIMM sockets. Proper handling, ESD precautions, and BIOS updates are recommended during installation to ensure stability and compatibility.

Labeling and Identification

The module features clear laser-etched or stickered identification with the full part number, speed rating, voltage, and ECC status. This facilitates easy inventory management and maintenance in enterprise deployments.

Platform Validation and BIOS Support

Before deployment, it's essential to verify that the server’s motherboard and BIOS support 4Rx4 LRDIMMs of this capacity and frequency. Most modern enterprise boards offer robust LRDIMM support, but firmware updates may be necessary.

Environmental Considerations and Compliance

Micron designs its server memory to comply with RoHS and other international environmental standards. The module is halogen-free and manufactured in facilities adhering to strict environmental policies.

Lifecycle Support and Availability

As part of Micron’s enterprise product line, the MTA72ASS8G72LZ-2G6R2 benefits from extended lifecycle support and guaranteed supply consistency for OEMs, integrators, and data centers requiring long-term component availability.

Certifications and Third-Party Validation

This module is validated and qualified by numerous OEMs and platform vendors to ensure maximum compatibility and reliability in real-world deployments.