AB786560 Dell 64GB 2666mhz Pc4-21300 Cl19 Ecc Registered Quad Rank DDR4 SDRAM.

Dell AB786560 64GB DDR4 LRDIMM Memory

The Dell AB786560 memory module is engineered to deliver dependable performance for enterprise‑grade PowerEdge servers. Designed with advanced load‑reduced technology, this 64GB DDR4 module enhances data throughput, stability, and multitasking efficiency in demanding data center environments.

General Specifications

• Brand Name: Dell
• Part Number: AB786560
• Product Category: High‑capacity DDR4 SDRAM Memory

Technical Information

• Total Capacity: 64GB
• Module Count: Single 64GB LRDIMM
• Memory Type: DDR4 SDRAM
• Speed Rating: 2666MHz (PC4‑21300 / PC4‑2666V)
• Error Correction: ECC for advanced data integrity
• Signal Type: Registered (RDIMM)
• CAS Latency: CL19
• Rank Configuration: Quad Rank x4

Physical Attributes

• 288‑pin LRDIMM layout
• Designed for enterprise‑class server motherboards

Compatibility

This module integrates seamlessly with a wide range of Dell PowerEdge systems

Supported Rack Servers

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

Supported Tower Servers

• PowerEdge T440
• PowerEdge T640

Supported Modular & Blade Systems

• PowerEdge C6420
• PowerEdge FC640
• PowerEdge M640

Dell AB786560 64GB 2666MHz Memory

The category of enterprise-grade server memory designed for Dell PowerEdge systems represents a critical foundation layer in modern data center architecture, addressing performance stability, scalability, and long-term operational reliability. Within this category, the Dell AB786560 64GB DDR4 memory module exemplifies the specialized engineering required to support mission-critical workloads that demand consistent throughput, predictable latency behavior, and advanced error management. This class of memory is purpose-built for servers that operate continuously under high utilization, supporting virtualization clusters, enterprise databases, cloud infrastructures, and transactional applications that cannot tolerate data corruption or unexpected downtime. The server memory category differs substantially from consumer-grade memory due to its focus on error correction, signal integrity, platform validation, and compatibility across multi-processor configurations commonly found in rack and tower servers.

Load-Reduced DDR4 Memory

Load-reduced DDR4 SDRAM occupies a distinct subcategory within server memory solutions, engineered to overcome electrical loading limitations associated with high-capacity DIMM configurations. The Dell AB786560 module belongs to this LRDIMM class, incorporating a memory buffer that isolates the memory controller from the electrical load of the DRAM chips. This architectural approach enables servers to populate more memory modules per channel while maintaining signal integrity and stable operation. In enterprise PowerEdge systems, this characteristic allows administrators to scale memory capacity to hundreds of gigabytes or even multiple terabytes without sacrificing reliability or performance consistency. LRDIMM technology is particularly valuable in virtualization-heavy deployments where memory density directly impacts consolidation ratios and infrastructure efficiency.

DDR4 Technology

DDR4 SDRAM represents a significant advancement over previous memory generations, offering higher bandwidth, improved power efficiency, and enhanced reliability features. Within the server memory category, DDR4 modules such as the Dell AB786560 are optimized for sustained performance rather than burst-oriented consumer workloads. Operating at 2666MHz with a PC4-21300 bandwidth rating, this memory delivers a balance of throughput and latency suitable for multi-threaded server applications. The CAS latency of CL19 reflects a design tuned for stability and compatibility across a wide range of PowerEdge platforms rather than aggressive overclocking or low-latency consumer scenarios.

Enterprise Workloads

A 2666MHz operating frequency provides sufficient bandwidth for most enterprise workloads, including virtualization hosts, in-memory analytics, and transactional databases. In server environments, memory frequency must be considered alongside channel count, rank configuration, and CPU architecture. The Dell AB786560 module supports efficient utilization of available memory channels, ensuring that processors are not starved for data during peak processing periods. This frequency tier is widely supported across multiple generations of PowerEdge servers, making it a versatile choice for both new deployments and incremental upgrades.

ECC Registered Memory

Latency characteristics such as CL19 are evaluated differently in server memory categories compared to desktop segments. The presence of ECC, registration, and load-reduction logic introduces additional clock cycles that are offset by increased stability and capacity scalability. The Dell AB786560 is engineered to deliver consistent latency behavior under sustained load, which is critical for applications with predictable response time requirements.

Error Correction

Error correcting code functionality is a defining feature of enterprise server memory categories. The Dell AB786560 incorporates ECC technology that detects and corrects single-bit memory errors while detecting multi-bit errors, significantly reducing the risk of data corruption. In PowerEdge server environments, ECC memory is not optional but a foundational requirement, as silent data corruption can compromise databases, virtual machines, and critical application states. This module’s ECC implementation works in conjunction with platform-level RAS features to provide end-to-end data protection.

Compatibility

The 288-pin DIMM form factor used by DDR4 server memory is a standardized physical interface that ensures compatibility across supported PowerEdge platforms. The Dell AB786560 adheres strictly to these specifications, enabling seamless integration into validated server configurations. Physical characteristics such as PCB layout, component placement, and thermal design are optimized for server chassis airflow patterns, ensuring reliable operation under sustained thermal load.

1.2V Power Efficiency

Operating at 1.2 volts, this memory module offers improved power efficiency compared to earlier generations, contributing to lower overall system power consumption. In data centers where energy efficiency directly impacts operational costs, the reduced voltage of DDR4 memory plays a meaningful role. The Dell AB786560 is designed to operate within the thermal envelopes defined by PowerEdge servers, ensuring stable performance without excessive heat generation even in densely populated memory configurations.

Server Chassis Airflow

Enterprise server memory must function reliably in controlled airflow environments, often with front-to-back cooling. The design of this LRDIMM ensures that heat dissipation is efficient and does not interfere with adjacent components. This consideration is critical in rack-mounted PowerEdge systems where airflow optimization is essential for maintaining overall system health and preventing thermal throttling.

PowerEdge

A defining characteristic of Dell-branded server memory categories is rigorous platform validation. The Dell AB786560 module is tested and certified for compatibility with specific PowerEdge server, ensuring that it meets firmware, BIOS, and hardware requirements. This validation process minimizes the risk of incompatibility issues, boot failures, or degraded performance that can occur with generic memory modules.

Use Cases

Virtualization platforms such as VMware, Hyper-V, and KVM place significant demands on memory capacity and reliability. The Dell AB786560 is well-suited for these environments, where each virtual machine consumes a portion of system memory and overall density determines consolidation efficiency. High-capacity LRDIMMs enable administrators to run more virtual machines per host while maintaining performance isolation and stability.

Database

Enterprise databases and in-memory analytics platforms benefit from large, reliable memory pools that reduce reliance on slower storage tiers. The consistent bandwidth and ECC protection provided by this memory module support transactional integrity and query performance. In PowerEdge deployments, this translates to faster response times and improved user experience for data-driven applications.

High-Availability

In environments where uptime is paramount, such as financial services, healthcare, and telecommunications, server memory reliability is non-negotiable. The Dell AB786560 contributes to high-availability architectures by minimizing the risk of memory-related failures. Its design aligns with redundancy strategies and failover mechanisms commonly employed in enterprise data centers.

Integration

Modern data centers rely on modular, scalable components that integrate seamlessly into standardized architectures. Server memory categories such as load-reduced DDR4 DIMMs play a crucial role in enabling flexible configurations that can adapt to changing workload demands. The Dell AB786560 supports this adaptability by providing high capacity, reliability, and compatibility within the PowerEdge ecosystem.