AB011872 Dell 64GB DDR4 2666mhz PC4-21300 ECC Registered Lrdimm

Dell AB011872 64GB PC4-21300 Memory

The Dell EMC AB011872 VXRail memory module delivers exceptional reliability and performance for enterprise-grade servers. Engineered with advanced DDR4 SDRAM technology, this 64GB 2666MHz PC4-21300 CL19 ECC Registered Quad Rank X4 LRDIMM ensures efficient multitasking, seamless data processing, and enhanced stability in demanding workloads.

General Information

• Brand Name: Dell
• Part Number: AB011872
• Product Type: 64GB DDR4 SDRAM Server Memory

Technical Specifications

• Capacity: 64GB single module
• Memory Type: DDR4 SDRAM
• Bus Speed: 2666MHz (PC4-21300 / PC4-2666V)
• Error Correction: ECC for superior data integrity
• Signal Processing: Registered design for optimized server performance
• Latency: CL19 timings for balanced speed and efficiency
• Rank Structure: Quad Rank X4 for advanced scalability

Physical Characteristics

• Form Factor: 288-Pin LRDIMM
• Voltage Requirement: 1.2V for energy-efficient operation

Compatibility

Supported Dell PowerEdge Servers

Rack Servers

• PowerEdge R440
• PowerEdge R540
• PowerEdge R640
• PowerEdge R740
• PowerEdge R740xd
• PowerEdge R940

Tower Servers

• PowerEdge T440
• PowerEdge T640

Modular & Cloud-Optimized Servers

• PowerEdge C6420
• PowerEdge FC640
• PowerEdge M640

Dell EMC AB011872 64GB Memory Overview

Dell EMC VxRail server memory modules represent a specialized category of enterprise-grade RAM engineered to operate within highly virtualized, software-defined, and hyperconverged infrastructures. Within this category, the Dell EMC AB011872 VxRail 64GB 2666MHz DDR4 LRDIMM memory module stands as a purpose-built solution designed to meet the stringent performance, reliability, and scalability requirements of modern data centers. Server memory modules in this class are not generic components; they are validated, firmware-aligned, and thermally optimized to integrate seamlessly with Dell EMC PowerEdge servers deployed as part of VxRail clusters. The category emphasizes predictable behavior under sustained workloads, long-term stability in 24/7 operations, and compatibility with VMware-centric environments that demand consistent memory performance across nodes.

Understanding the Role

Within the broader server memory category, 64GB DDR4 LRDIMM modules occupy a critical middle-to-high capacity tier that enables dense memory configurations without sacrificing speed or stability. The Dell EMC AB011872 module, operating at 2666MHz with PC4-21300 bandwidth, is engineered to support memory-intensive workloads such as virtualization, database processing, analytics platforms, and private cloud deployments. Load Reduced DIMM technology differentiates this subcategory from standard RDIMM solutions by minimizing the electrical load on the memory controller, allowing servers to populate more memory slots at higher capacities while maintaining signal integrity and performance consistency.

2666MHz Memory

The 2666MHz operating frequency defines the data transfer rate at which the memory module communicates with the server’s integrated memory controller. In practical terms, PC4-21300 bandwidth enables high-throughput data movement essential for multi-core processors handling concurrent workloads. Within the Dell EMC VxRail memory category, this frequency represents a balanced point between performance efficiency and platform compatibility, ensuring that VxRail nodes can sustain heavy virtualization densities without encountering memory bottlenecks. The category prioritizes stable frequency operation under load, which is particularly important in clustered environments where performance variance between nodes can negatively impact overall system efficiency.

CL19 Latency

CAS Latency 19 is a carefully selected timing parameter that aligns with the reliability and predictability goals of enterprise server memory. Rather than pursuing the lowest possible latency at the expense of stability, the Dell EMC AB011872 memory module adheres to latency values that have been extensively validated across PowerEdge and VxRail platforms. This ensures consistent response times for memory access operations, which is critical for transactional workloads, virtual desktop infrastructure, and real-time analytics. The server memory category encompassing this module emphasizes deterministic behavior over marginal latency gains, supporting service-level agreements and mission-critical application performance.

ECC Registered

Error Correcting Code registered memory is a defining feature of this server memory category. ECC functionality enables the detection and correction of single-bit memory errors, significantly reducing the risk of data corruption and system crashes. The registered architecture further enhances stability by buffering command and address signals, allowing the memory controller to manage larger memory configurations more reliably. In the context of Dell EMC VxRail deployments, ECC registered memory is not optional but foundational, supporting enterprise-grade uptime requirements and protecting workloads from silent data corruption that could compromise business operations.

Quad Rank x4

The quad rank x4 configuration of the Dell EMC AB011872 memory module reflects a design optimized for high-capacity deployments. Quad rank modules effectively increase memory density per slot, enabling administrators to maximize total system memory without exhausting available DIMM slots. The x4 data organization enhances fault tolerance by allowing ECC mechanisms to operate more effectively. Within the server memory category, quad rank LRDIMMs are particularly valued in virtualization and cloud environments where memory capacity directly influences the number of virtual machines or containers that can be hosted on a single node.

1.2V Low-Voltage

Power efficiency is a critical consideration in modern data centers, and the 1.2V operating voltage of DDR4 memory modules contributes to reduced overall energy consumption. The Dell EMC AB011872 VxRail memory module aligns with this efficiency-focused category by delivering high capacity and performance without increasing power draw. Lower voltage operation also reduces heat generation, which in turn eases cooling requirements and supports higher density server configurations. This aspect of the category is particularly relevant for organizations seeking to optimize total cost of ownership while maintaining enterprise performance standards.

288-Pin LRDIMM

The 288-pin DIMM form factor is the standard for DDR4 server memory, ensuring physical compatibility with Dell EMC PowerEdge server motherboards. The LRDIMM design incorporates a memory buffer that isolates the memory controller from the electrical load of the DRAM chips, enabling greater scalability. In the Dell EMC VxRail memory category, physical compatibility is paired with firmware-level validation, ensuring that the memory module is recognized correctly by system BIOS and management tools.

Data Center

Server memory modules in this category are engineered with thermal performance in mind. The Dell EMC AB011872 module features design characteristics that support efficient heat dissipation, maintaining stable operating temperatures even under sustained workloads. Thermal reliability is essential in VxRail clusters where nodes operate continuously and often in densely packed racks. By maintaining thermal stability, this category of memory supports long-term reliability and reduces the likelihood of performance throttling or hardware failure due to overheating.

Scalability

Hyperconverged infrastructure relies heavily on memory scalability to deliver predictable performance as workloads grow. The server memory category represented by the Dell EMC AB011872 module is designed to support incremental expansion, allowing organizations to scale memory capacity as application demands increase. LRDIMM technology enables higher total memory capacities per node, which is particularly advantageous in VxRail clusters where compute, storage, and networking resources are tightly integrated. This scalability supports future-proofing strategies and extends the useful lifespan of server investments.

Integration

Dell EMC PowerEdge servers are designed with advanced memory architectures that leverage DDR4 LRDIMM capabilities. The AB011872 memory module integrates seamlessly with these architectures, supporting features such as memory mirroring, sparing, and advanced RAS functions. Within the server memory category, this integration ensures that memory resources are utilized efficiently and protected against potential faults. The result is a resilient memory subsystem that aligns with Dell EMC’s enterprise design philosophy.