AC512779 Dell 256GB DDR5-4800MHz PC5-38400 8RX4 CL40 Ecc Registered Memory

Dell AC512779 256GB DDR5 Memory Module

Key Specifications

The Dell AC512779 memory module features a substantial 256GB capacity organized as a single 1x256GB module. This high-density configuration is engineered for memory-intensive applications and systems requiring substantial RAM resources without sacrificing physical slot availability. The 8Rx4 organization refers to the physical arrangement of memory chips on the module, specifically eight ranks of memory with four-bit prefetch architecture. This advanced organization enables efficient data access patterns and optimal performance for enterprise-level workloads, database management, and virtualization environments where memory bandwidth and capacity are critical operational factors.

Performance Characteristics

Operating at a base speed of 4800MT/s (MegaTransfers per second), this DDR5 memory module delivers significant bandwidth improvements over previous DDR4 generations. The PC5-38400 designation indicates the peak transfer rate of 38,400 MB/s per module, providing substantial data throughput for demanding computational tasks. With a CAS Latency of CL40, this module balances speed with responsiveness, ensuring efficient data access cycles while maintaining the stability requirements essential for server and workstation environments. The 1.10V operating voltage represents the advanced power efficiency of DDR5 technology, reducing overall system power consumption while maintaining performance thresholds.

Advanced Memory Architecture

ECC Registered Technology

The Dell AC512779 incorporates Error Correcting Code (ECC) functionality with Registered buffering technology. ECC memory includes additional bits to detect and correct single-bit memory errors automatically, significantly enhancing system reliability and data integrity. This capability is crucial for applications where data accuracy is paramount, including financial transactions, scientific computations, database management, and enterprise server operations. The registered buffering (RDIMM) architecture features a register between the memory controller and DRAM modules, reducing electrical load on the memory controller and enabling support for higher memory capacities and more DIMMs per channel. This combination of ECC and registered technology ensures optimal signal integrity, system stability, and error-free operation in mission-critical computing environments.

DDR5 Technological Advancements

This module leverages the architectural improvements of DDR5 technology, including enhanced channel efficiency with the implementation of two independent 40-bit data channels (32 data bits with 8 ECC bits each) per module. The integrated Power Management IC (PMIC) provides more stable power distribution and improved power efficiency compared to previous generations. The burst length has been doubled to BL16, and bank groups have been increased to support higher concurrent operations. These architectural enhancements result in significantly improved bandwidth, better power management, and increased reliability for next-generation server platforms and high-performance workstations requiring exceptional memory performance and capacity scaling.

Physical Dimensions and Interface

The Dell AC512779 utilizes the standard 288-pin RDIMM form factor, measuring approximately 133.35mm in length with a standard height profile compatible with most server and workstation chassis. The pin configuration and notch position are specifically designed for DDR5 platforms, preventing accidental insertion into incompatible DDR4 slots. The module features a robust PCB construction with enhanced signal integrity characteristics, including improved trace routing and power delivery networks optimized for high-frequency operation. The physical design incorporates thermal sensors and management features to monitor operating temperatures and maintain optimal performance under varying load conditions.

Voltage and Power Management

Operating at a nominal voltage of 1.10V, this DDR5 module represents a significant reduction in power consumption compared to DDR4 technology while delivering higher performance. The integrated PMIC (Power Management Integrated Circuit) enables more efficient power delivery directly to the DIMM, reducing motherboard complexity and improving voltage regulation. This distributed power architecture allows for better power granularity, enhanced power monitoring capabilities, and more stable operation under heavy load conditions. The module supports advanced power management states, allowing systems to optimize power consumption based on workload demands without compromising performance when needed.

Performance and Application Scenarios

Data Center Applications

The Dell AC512779 256GB DDR5 module is engineered for enterprise server environments where reliability, capacity, and performance are critical. In database servers, the high-density 256GB capacity allows for larger in-memory databases, reducing disk I/O and significantly improving query performance and transaction throughput. For virtualization hosts, these modules enable higher virtual machine density with adequate memory resources for each guest operating system, improving consolidation ratios and overall infrastructure efficiency. In cloud computing infrastructure, the combination of high capacity and DDR5 performance characteristics supports multi-tenant environments with demanding and variable workload patterns.

High-Performance Computing

For technical computing, scientific research, and engineering simulations, the Dell AC512779 provides the memory capacity required for large dataset manipulation and complex computational models. The ECC functionality ensures computational accuracy by preventing soft errors that could compromise research results or engineering analyses. The high bandwidth of 4800MT/s facilitates faster data movement between processors and memory, reducing computation time for memory-bound applications. In financial services applications, the module supports complex risk modeling, algorithmic trading systems, and real-time analytics where both capacity and performance directly impact business operations and decision-making capabilities.

Workstation and Specialized Applications

In professional workstation environments for content creation, video editing, 3D rendering, and digital media production, the Dell AC512779 modules enable working with larger assets and more complex scenes without constant disk swapping. The high memory capacity allows for complete project files to reside in memory, significantly reducing processing time for rendering, effects computation, and high-resolution video processing. For architectural visualization and engineering design, the modules support larger texture sets, more detailed models, and real-time rendering of complex scenes, improving workflow efficiency and creative iteration speed.

Compatibility and System Integration

Dell System Compatibility

The Dell AC512779 256GB DDR5 module is specifically validated and qualified for compatibility with Dell PowerEdge server platforms and Precision workstation systems designed for DDR5 memory technology. This module is engineered to work within Dell's thermal and electrical specifications, ensuring optimal performance and reliability in Dell infrastructure. Compatibility extends to specific Dell system families that support 256GB RDIMM modules at 4800MT/s speeds, typically including next-generation server platforms with appropriate memory controllers and BIOS revisions. System manufacturers typically provide compatibility guides and memory configuration tools to ensure proper module selection and population guidelines for optimal performance.

General Platform Requirements

Beyond specific Dell systems, this memory module requires platforms with DDR5 memory architecture support, including appropriate memory controllers capable of operating at 4800MT/s with ECC Registered DIMMs. The system BIOS/UEFI must support DDR5 technology with the necessary training algorithms and timing parameters for stable operation. Motherboards must provide the physical 288-pin DDR5 RDIMM slots with proper keying and mechanical retention mechanisms. Thermal management considerations include adequate airflow across the memory modules, as high-density DDR5 memory generates heat during operation that must be dissipated to maintain performance and reliability.

Performance Optimization

To achieve optimal performance with Dell AC512779 modules, systems should be configured with balanced memory distribution across available memory channels. Operating systems and applications should be tuned to leverage the available memory capacity through appropriate configuration settings and memory allocation parameters. For memory-intensive applications, consideration should be given to NUMA (Non-Uniform Memory Access) architecture awareness to ensure memory is allocated from the optimal NUMA node relative to executing processors. Firmware and driver updates should be maintained at recommended levels to ensure compatibility, performance optimizations, and reliability enhancements provided by system manufacturers.

Enterprise-Grade Reliability

The Dell AC512779 implements advanced ECC technology capable of detecting and correcting single-bit errors while detecting multi-bit errors. This error correction capability significantly reduces the probability of uncorrected memory errors that could lead to system crashes, data corruption, or computational inaccuracies. The module supports additional reliability features including command/address parity detection with retry capability, which helps maintain system stability by ensuring memory commands are received correctly. These reliability features are essential for systems requiring continuous operation and data integrity, such as database servers, financial transaction processing, and critical infrastructure applications.

Performance and Efficiency Improvements

The transition from DDR4 to DDR5 technology represented by the Dell AC512779 brings substantial improvements in both performance and power efficiency. DDR5 operates at higher data rates starting at 4800MT/s compared to DDR4's typical maximum of 3200MT/s, providing approximately 50% higher bandwidth. The architectural changes in DDR5, including the division into two independent 32-bit data channels, improve concurrency and efficiency for modern multi-core processors. Power efficiency is enhanced through the lower operating voltage (1.1V vs. DDR4's 1.2V) and improved power management through the integrated PMIC. These improvements collectively deliver higher performance per watt, enabling systems to process more data with less energy consumption, an important consideration for large-scale deployments and energy-efficient computing initiatives.

Reliability and RAS Features

DDR5 introduces enhanced Reliability, Availability, and Serviceability (RAS) features beyond what was available in DDR4 technology. The error correction capabilities are more robust, and new features like on-die ECC provide additional protection for the DRAM arrays themselves. The command/address parity with retry capability improves system stability by detecting and correcting communication errors between the memory controller and DRAM modules. These enhancements make DDR5 memory particularly suitable for mission-critical applications where system uptime and data integrity are essential operational requirements. The Dell AC512779 implements these DDR5 RAS features to provide enterprise-grade reliability for demanding computing environments.