AB786559 Dell 32GB DDR4 2666MHz ECC RDIMM Memory Module

Dell AB786559 32GB DDR4 Memory

The Dell AB786559 32GB DDR4 RDIMM is engineered to deliver dependable, high‑capacity server performance. Designed for enterprise‑grade workloads, this ECC Registered memory module enhances system responsiveness, boosts multitasking efficiency, and ensures stable data processing across demanding server environments.

Manufacturer Information

• Brand Name: Dell
• Part Number: AB786559
• Product Name: 32GB DDR4 SDRAM Memory

Technical Specifications

• Capacity: 32GB
• Module Count: Single 32GB RDIMM
• Memory Type: DDR4 SDRAM
• Speed Rating: 2666MHz (PC4‑21300)
• CAS Latency: CL19
• Data Protection: ECC for error detection and correction
• Signal Type: Registered for enhanced stability
• Rank Structure: 2Rx4

Physical Attributes

• Form Factor: 288‑Pin RDIMM
• Voltage: 1.2V low‑power operation

System Compatibility

This Dell RDIMM module is compatible with a wide range of Dell PowerEdge servers and Precision workstations, ensuring seamless integration and optimal performance.

Dell PowerEdge Servers

• PowerEdge R640
• PowerEdge R740
• PowerEdge R740xd
• PowerEdge R940
• PowerEdge R440
• PowerEdge R540
• PowerEdge T440
• PowerEdge T640
• PowerEdge C4140
• PowerEdge C6420
• PowerEdge FC640
• PowerEdge M640
• PowerEdge M640 VRTX

Dell Precision Workstations

• Precision T5820 / T5820 XL
• Precision T7820 / T7820 XL
• Precision T7920 / T7920 XL
• Precision R7920 / R7920 XL

Dell AB786559 32GB 2666MHz Memory Overview

The Dell AB786559 32GB 2666MHz PC4-21300 CL19 ECC Registered Dual Rank x4 DDR4 SDRAM RDIMM is positioned within a specialized server memory category designed to support enterprise computing environments where stability, predictability, and sustained performance are mandatory requirements. This category encompasses registered dual in-line memory modules engineered for use in rack servers, blade systems, and tower servers that operate under continuous workloads. Unlike consumer-grade memory, this class of server memory is manufactured to meet stricter tolerances, validated against platform-specific firmware, and optimized for compatibility with enterprise server chipsets. The use of DDR4 technology operating at 2666MHz ensures an optimal balance between bandwidth throughput and power efficiency, making this category highly relevant for data centers, private cloud infrastructures, virtualization platforms, and mission-critical business applications.

DDR4 RDIMM

This category relies on DDR4 registered DIMM architecture, which incorporates a register between the memory controller and DRAM modules to reduce electrical load. The register allows servers to populate more memory modules per channel without signal degradation, an essential characteristic in scalable enterprise systems. The Dell AB786559 module operates at PC4-21300, delivering theoretical bandwidth well-suited for multi-socket processors and memory-intensive applications. Registered memory significantly improves signal integrity, enabling consistent data transmission across densely populated memory configurations. This category is especially critical in environments where maximum memory capacity and reliability are prioritized over marginal latency reductions found in unbuffered memory solutions.

System Stability

Registered buffering within this category plays a central role in enhancing system uptime and operational resilience. By isolating the memory controller from direct electrical load imposed by multiple DRAM chips, registered DIMMs enable stable performance even under heavy workloads. This design reduces the risk of data corruption and timing errors, which is essential in enterprise-grade servers handling financial transactions, database operations, and virtual machine orchestration. The Dell AB786559 module exemplifies this approach, ensuring that memory signaling remains consistent across varying thermal and electrical conditions.

Error Correction Code

ECC functionality defines a core aspect of this server memory category, offering automatic detection and correction of single-bit memory errors. ECC memory continuously monitors data integrity at the hardware level, correcting errors before they propagate into the operating system or application layer. The Dell AB786559 module supports ECC Registered functionality, reinforcing its suitability for enterprise workloads where even minor data corruption can lead to severe operational consequences. This category is essential in servers running database management systems, enterprise resource planning software, virtualization hypervisors, and analytics platforms that require unwavering data accuracy.

Single-Bit Error Correction

Within this category, ECC memory modules provide a safety net against common memory errors caused by electrical interference, cosmic radiation, or component aging. Single-bit errors are corrected in real time, while multi-bit errors are detected and reported, allowing system administrators to take proactive maintenance actions.

ECC Memory

Virtualization platforms depend heavily on memory integrity, as a single memory error can affect multiple virtual machines simultaneously. This category of ECC registered memory is fundamental to maintaining isolation and stability in hypervisor-based infrastructures. The Dell AB786559 module ensures that memory errors do not cascade across workloads, protecting both system performance and data integrity. Cloud service providers and enterprise IT departments rely on this category to deliver consistent service-level agreements and predictable performance metrics.

Memory Speed

The 2666MHz operating frequency defines the performance envelope of this memory category, offering a balance between throughput and power consumption. PC4-21300 bandwidth supports high-speed data transfers essential for modern server CPUs, enabling efficient execution of multi-threaded workloads. The CAS latency of CL19 reflects a design optimized for stability rather than aggressive overclocking, aligning with enterprise expectations for consistent and validated performance. The Dell AB786559 module fits seamlessly into this category, providing reliable speed characteristics compatible with a wide range of server platforms.

Dual Rank x4

The dual rank x4 configuration represents a defining feature of this memory category, enabling higher memory density and improved signal reliability. Dual rank memory modules present two sets of memory ranks to the memory controller, effectively increasing available memory capacity per DIMM. The x4 organization enhances fault tolerance by distributing data across multiple DRAM chips. The Dell AB786559 module exemplifies this design philosophy, making it suitable for servers requiring large memory footprints without compromising reliability.

Advantages

Dual rank memory offers improved performance in certain workloads by allowing interleaving between ranks, which can enhance memory throughput. This category benefits applications that perform frequent memory access operations, such as virtualization hosts and high-performance computing nodes. The Dell AB786559 module supports these scenarios by providing a robust memory architecture optimized for sustained data access patterns.

Compatibility

This category of server memory is defined by rigorous compatibility and validation processes. The Dell AB786559 module is engineered to integrate seamlessly with Dell PowerEdge servers and compatible enterprise platforms. Validation includes extensive testing with server firmware, BIOS configurations, and operating systems to ensure stable operation across supported platforms.

Use Cases

This category of server memory is integral to a wide range of enterprise use cases, including virtualization, database hosting, application servers, and analytics platforms. The Dell AB786559 module provides the capacity and reliability needed to support growing data volumes and increasing computational demands. Its 32GB capacity per module enables efficient scaling of memory resources without excessive DIMM population.

Virtualization

Virtualization environments benefit significantly from high-capacity, reliable memory. This category supports server consolidation initiatives by enabling higher virtual machine density per host. The Dell AB786559 module allows IT administrators to allocate sufficient memory resources to each workload while maintaining system stability.

Database

Database servers demand consistent memory performance and data integrity. This category of ECC registered memory supports in-memory caching, query processing, and transaction handling with minimal risk of data corruption. The Dell AB786559 module is well-suited for relational and NoSQL databases operating in enterprise environments.