AC239378 Dell PC5-38400 32GB RAM Ddr5-4800MHz 2RX8 Ecc Sdram 288-pin Rdimm Module

Dell AC239378 32GB DDR5 Server Memory Module

Key Specifications

The Dell AC239378 represents a significant advancement in server memory technology, delivering exceptional performance and reliability for enterprise environments. This 32GB DDR5 module operates at a blazing-fast 4800MT/s (MegaTransfers per second), providing the bandwidth necessary for demanding server applications. The module conforms to the PC5-38400 classification, indicating its peak transfer rate of 38,400 MB/s in a single module configuration. With a CAS Latency (CL) of 40, this memory strikes an optimal balance between speed and responsiveness, ensuring efficient data processing for critical server workloads.

Power Efficiency

Operating at just 1.1 volts, the Dell AC239378 demonstrates remarkable power efficiency compared to previous DDR4 generations. This reduced voltage requirement translates to lower power consumption and reduced heat generation within server enclosures, contributing to overall improved energy efficiency in data center environments. The power-efficient design helps organizations meet sustainability goals while maintaining high performance standards for their server infrastructure.

ECC Registered Technology

The Dell AC239378 incorporates Error Correcting Code (ECC) technology with registered design, providing crucial data integrity protection for enterprise servers. ECC functionality automatically detects and corrects single-bit memory errors in real-time, preventing data corruption and system crashes that can result from memory faults. The registered design includes a register between the memory controller and DRAM modules, reducing electrical load on the memory controller and enabling support for higher memory capacities per channel. This combination makes the module ideal for mission-critical applications where data accuracy and system stability are paramount.

Dual Rank 2Rx8 Configuration

This memory module features a 2Rx8 dual rank architecture, meaning it contains two separate sets of memory chips that can be accessed independently. The x8 designation refers to the physical organization of the DRAM chips, with each chip having an 8-bit data width. This configuration provides better performance compared to single-rank modules by allowing overlapping access to different ranks, effectively increasing memory bandwidth utilization. The dual-rank design also improves signal integrity by reducing the electrical load per rank, contributing to overall system stability at high speeds.

Physical Form Factor

The Dell AC239378 utilizes the standard 288-pin RDIMM (Registered Dual In-Line Memory Module) form factor, specifically designed for server environments. The 288-pin configuration is exclusive to DDR5 technology and is not physically compatible with DDR4 or earlier memory types. The module's physical dimensions adhere to industry standards, ensuring proper fitment in compatible server memory slots. The distinctive notch position prevents accidental insertion into incompatible motherboard sockets, safeguarding against potential damage during installation.

Server Compatibility Requirements

This memory module is engineered specifically for Dell PowerEdge servers and other compatible Dell enterprise systems. It is essential to verify compatibility with specific server models before procurement, as memory requirements can vary between different generations of server hardware. The module is designed to work in systems that support DDR5 registered memory technology and requires a server platform with a compatible memory controller. For optimal performance, modules should be installed in matching pairs or according to the server manufacturer's specific population guidelines.

Performance Characteristics

Bandwidth and Data Transfer Rates

With a data rate of 4800MT/s, the Dell AC239378 delivers substantial bandwidth improvements over previous DDR4 generations. The PC5-38400 designation indicates a peak transfer rate of approximately 38.4 GB/s per module, enabling faster data access and processing for memory-intensive applications. This enhanced bandwidth is particularly beneficial for virtualization environments, database servers, and high-performance computing applications where rapid memory access directly impacts overall system performance and user experience.

Latency and Timing Parameters

The CL40 latency specification represents the number of clock cycles between a memory controller issuing a read command and the availability of the requested data. While higher than some DDR4 modules in terms of absolute cycles, the significantly faster clock speed of DDR5 results in lower actual latency in nanoseconds. Additional timing parameters, including tRCD, tRP, and tRAS, are optimized for server workloads, ensuring responsive performance across various operating conditions and workload types.

Enterprise Features and Reliability

Beyond standard single-bit error correction, the ECC implementation in the Dell AC239378 provides multi-bit error detection capabilities. While single-bit errors are corrected transparently without system interruption, multi-bit errors are detected and reported to the system management controller. This allows for proactive maintenance and potential replacement before memory issues impact system availability. The ECC functionality works in conjunction with server operating systems and management tools to provide comprehensive memory health monitoring and reporting.

DDR5 Technological Advancements

On-Die ECC Implementation

The Dell AC239378 leverages DDR5's innovative on-die ECC capability, which provides error correction within individual DRAM chips before data is transmitted to the memory controller. This additional layer of error protection complements the traditional module-level ECC, creating a comprehensive data integrity framework. On-die ECC addresses reliability challenges associated with smaller manufacturing processes and higher memory densities, ensuring consistent operation even as semiconductor technology continues to advance toward smaller node sizes.

Power Management Infrastructure

DDR5 technology introduces a significant architectural change by moving power management from the motherboard to the memory module itself. The Dell AC239378 incorporates a Power Management IC (PMIC) on the module, enabling more precise voltage regulation and improved power delivery efficiency. This distributed power architecture reduces electrical noise and signal integrity issues, supporting higher operating speeds and improved stability. The PMIC also provides enhanced power monitoring capabilities, allowing for more granular power management and optimization at the module level.

Signal Integrity

The Dell AC239378 implements advanced signal integrity features including Decision Feedback Equalization, which helps maintain signal quality at high data rates. DFE compensates for channel impairments and inter-symbol interference that can occur during high-speed data transmission, enabling reliable operation at 4800MT/s and beyond. This technology is particularly important in server environments where signal paths may be longer and more complex than in consumer systems, ensuring data integrity across various system configurations and operating conditions.

Dual Subchannel Architecture

DDR5 memory introduces a dual subchannel architecture that effectively doubles the burst length compared to DDR4 while maintaining the same burst chop length for backward compatibility. This architectural improvement increases memory efficiency by allowing more simultaneous operations and reducing command conflicts. The Dell AC239378 leverages this enhanced architecture to deliver improved performance for both sequential and random access patterns, benefiting a wide range of server applications from large-scale data analytics to transactional database processing.

Application Scenarios and Use Cases

Virtualization and Cloud Infrastructure

The Dell AC239378 32GB module is ideally suited for virtualization hosts requiring substantial memory capacity to support multiple virtual machines. The high density per module allows organizations to maximize memory capacity within limited physical space, while the 4800MT/s speed ensures responsive performance across virtualized workloads. ECC protection is particularly valuable in virtualization environments where memory errors could potentially affect multiple virtual machines simultaneously, helping to maintain service availability and data integrity across the virtual infrastructure.

Cloud Computing Platforms

For public and private cloud deployments, the reliability and performance characteristics of the Dell AC239378 make it an excellent choice for infrastructure nodes. The module's power efficiency contributes to reduced operational costs in large-scale deployments, while the high bandwidth supports demanding cloud applications and services. The registered design enables stable operation in fully populated memory configurations, ensuring consistent performance even in high-density server installations typical of cloud infrastructure environments.

In-Memory Database Systems

Modern in-memory database systems benefit significantly from the high bandwidth and capacity offered by the Dell AC239378. The module's 4800MT/s data rate accelerates data access operations, reducing query response times and improving overall database performance. ECC functionality is crucial for database applications where data accuracy is non-negotiable, preventing corruption of critical business information. The 32GB capacity per module enables substantial in-memory data sets, reducing reliance on slower storage subsystems and accelerating transactional processing.