AB786565 Dell 32GB DDR4 3200MHz PC4-25600 ECC RDIMM Memory

Dell AB786565 32GB DDR4 Server Memory Module

Memory Capacity

The Dell AB786565 is a high-performance 32GB memory module designed specifically for enterprise server environments. This single module features a 32GB capacity utilizing a 1x32GB configuration, providing substantial memory resources in a single DIMM slot. The module operates at a speed of 3200MHz (PC4-25600), delivering high-bandwidth performance crucial for data-intensive server applications. With a CAS latency of CL22, this memory maintains optimal timing characteristics while ensuring reliable performance under demanding workloads.

ECC and Registered DIMM Technology

The Dell AB786565 incorporates advanced Error Correcting Code (ECC) technology, which provides single-bit error correction and multi-bit error detection capabilities. This critical feature ensures data integrity by automatically detecting and correcting memory errors in real-time, preventing data corruption and system crashes. ECC functionality is essential for mission-critical applications where data accuracy is paramount, including financial transactions, database operations, and scientific computing. The module's ECC architecture operates transparently to the operating system and applications, providing protection without performance penalties.

Registered DIMM (RDIMM) Architecture

As a Registered DIMM (RDIMM), this memory module includes a register between the memory controller and DRAM chips. This register buffers address, control, and clock signals, reducing the electrical load on the memory controller and enabling support for higher memory capacities per channel. The registered design allows for more stable operation with multiple modules installed and supports larger overall memory configurations in multi-processor server systems. This architecture is particularly beneficial in systems requiring large memory footprints, as it maintains signal integrity across densely populated memory channels.

Dual Rank and X4 Chip

Dual Rank Architecture Benefits

The dual rank configuration of the AB786565 memory module provides significant performance advantages in server environments. Dual rank modules contain two separate sets of memory chips that can be accessed independently, though not simultaneously. This architecture allows for improved memory interleaving and better utilization of memory bandwidth. When combined with other dual rank modules in a system, the memory controller can alternate accesses between ranks, reducing access latency and improving overall memory throughput. This design is particularly effective in multi-threaded applications and virtualized environments where multiple processes access memory concurrently.

X4 DRAM Device Organization

The module utilizes x4 DRAM device organization, meaning each memory chip has a 4-bit data interface. This configuration provides enhanced reliability through improved chipkill functionality and better error correction capabilities. The x4 organization allows for more efficient use of the memory bus and provides additional redundancy compared to x8 organization. This architecture is specifically designed for enterprise environments where maximum reliability and data protection are required. The x4 configuration also supports SDDC (Single Device Data Correction), which can correct errors in a single DRAM device, providing additional protection against chip failures.

Form Factor

288-Pin DIMM Physical Dimensions

The Dell AB786565 memory module conforms to the standard 288-pin DDR4 DIMM form factor with dimensions of approximately 133.35mm (5.25 inches) in length and 31.25mm (1.23 inches) in height. The module features a single notch position that is specifically keyed to prevent insertion into incompatible memory sockets. The 288-pin design provides the necessary interface for DDR4 signaling, including data, address, control, and power pins. The physical construction includes a robust PCB with multiple layers to ensure signal integrity and proper impedance matching for high-frequency operation.

Supported Server Platforms

The Dell AB786565 memory module is specifically validated and certified for use in Dell PowerEdge 14th generation (14G) and 15th generation (15G) servers. This includes popular server models such as the R740, R740XD, R740XD2, R7415, R7425, R7515, R7525, T640, and other 14G/15G platform variants. The module undergoes rigorous compatibility testing with these systems to ensure optimal performance and reliability. Each memory module contains SPD (Serial Presence Detect) programming that provides the system BIOS with essential timing parameters and configuration information specific to Dell PowerEdge servers.

Performance Characteristics

Speed and Bandwidth Capabilities

The 3200MHz operating frequency of the Dell AB786565 memory module provides a significant performance advantage over lower-speed memory modules. At this frequency, the module achieves a peak transfer rate of 25600 MB/s (hence the PC4-25600 designation), enabling faster data access and improved application performance. The high-speed operation is particularly beneficial for memory-intensive applications such as database servers, virtualization hosts, and high-performance computing clusters. The module maintains this performance while operating within the specified thermal and power envelopes, ensuring reliable long-term operation.

Memory Bandwidth Optimization

When installed in multi-channel memory configurations, the AB786565 module contributes to optimized memory bandwidth across the system. Dell PowerEdge servers typically support multi-channel memory architectures (dual, triple, or hex-channel depending on the platform), allowing multiple memory modules to be accessed simultaneously. The 3200MHz speed ensures that each channel operates at maximum efficiency, providing substantial aggregate memory bandwidth to support multiple virtual machines, database transactions, or computational workloads. The module's timing characteristics are optimized for server workloads, balancing latency and throughput for enterprise applications.

Reliability and Serviceability

Enterprise-Grade Reliability Features

The Dell AB786565 memory module incorporates multiple enterprise-grade reliability features beyond standard ECC protection. These include temperature sensors that monitor module temperature and can trigger thermal throttling if necessary to prevent overheating. The module supports advanced reliability features such as Patrol Scrubbing, which proactively searches for and corrects memory errors before they can cause system issues, and Demand Scrubbing, which corrects errors when memory is read. These features work together to provide a comprehensive memory protection system that minimizes downtime and data corruption in critical server environments.

Application Scenarios and Use Cases

Enterprise Server Applications

The Dell AB786565 32GB memory module is ideally suited for virtualization environments where memory capacity and reliability are critical. In hypervisor platforms such as VMware vSphere, Microsoft Hyper-V, or Citrix Hypervisor, the module provides the necessary memory resources to host multiple virtual machines simultaneously. The ECC protection ensures data integrity across virtual machines, while the high capacity reduces the memory footprint required for virtualization overhead. The 3200MHz speed supports memory-intensive virtualized applications and helps minimize performance degradation during periods of high contention.

Database and Transaction Processing

For database servers running Microsoft SQL Server, Oracle Database, MySQL, or other database management systems, the AB786565 memory provides the performance and reliability needed for optimal database operation. The large 32GB capacity allows for substantial database caching, reducing disk I/O and improving query performance. The ECC functionality protects against data corruption that could compromise database integrity, while the registered design ensures stable operation with large memory configurations. These characteristics make the module particularly suitable for OLTP (Online Transaction Processing) systems where data accuracy and availability are paramount.

High-Performance Computing (HPC)

In High-Performance Computing clusters, the Dell AB786565 memory module delivers the performance characteristics required for computational workloads. The high bandwidth supports data-intensive applications in scientific computing, financial modeling, and engineering simulation. The module's reliability features ensure extended compute jobs can complete without interruption due to memory errors. When configured in multi-socket server systems with optimal memory population, the modules provide balanced memory bandwidth across multiple processors, enabling efficient parallel processing of large datasets.