P64709-B21 HPE 128GB PC5-44800 ECC DDR5 288-Pin Memory Module.

HPE P64709-B21 128GB DDR5 RDIMM Overview

The HPE P64709-B21 128GB 5600MT/s PC5-44800 ECC DDR5 SDRAM 288-Pin RDIMM Memory Module is engineered for performance-intensive enterprise server applications, including virtualization, in-memory analytics, database processing, and cloud-native workloads. Featuring cutting-edge DDR5 architecture, this module delivers unparalleled memory bandwidth, reduced latency, and exceptional reliability for next-generation data centers. With enhanced power management, high memory density, and advanced ECC capabilities, it supports scalable infrastructure deployments across hybrid, cloud, and on-premises environments.

Key Technical Specifications and Performance Capabilities

Memory Speed and Bandwidth: 5600MT/s Throughput

The HPE P64709-B21 supports memory transfer rates of up to 5600 mega-transfers per second (MT/s), which enables lightning-fast data access and high-bandwidth performance. This increased throughput translates to faster processing of large datasets, optimized application responsiveness, and enhanced support for multi-core server CPUs in virtualization-heavy environments.

Module Capacity: 128GB High-Density ECC RDIMM

This memory module offers a massive 128GB capacity within a single RDIMM, maximizing the potential of server DIMM slots. High-density memory modules like the P64709-B21 are essential for workloads requiring expansive memory allocation, such as SAP HANA, real-time data analytics, and high-volume transaction processing systems.

DDR5 SDRAM Technology Advancements

DDR5 introduces fundamental changes in memory architecture over DDR4. The dual 32-bit sub-channel design increases parallelism, reduces latency, and boosts overall throughput. On-die ECC (ODECC) and integrated power management chips contribute to enhanced error correction, improved stability, and efficient energy utilization.

ECC Support for Data Integrity

The module integrates Error-Correcting Code (ECC) functionality to automatically detect and correct single-bit memory errors, preventing potential data corruption and increasing system uptime. ECC is indispensable for mission-critical applications where data accuracy and continuous availability are paramount.

PC5-44800 Compliance and CAS Latency

The PC5-44800 specification corresponds to a peak data transfer rate of 44.8 GB/s, supported by a CAS latency (CL) configuration optimized for performance balance. While DDR5’s latency numbers appear numerically higher than DDR4, their effective delay is lower thanks to architectural improvements in the command processing pipeline.

288-Pin RDIMM Format and Compatibility

Featuring a 288-pin design, this RDIMM is electrically and physically compatible with DDR5-capable HPE servers. It is specifically validated for platforms like HPE ProLiant Gen11 servers and is engineered to meet the demands of high-performance computing, dense virtualization, and data-intensive workflows.

Optimized Server Integration and Compatibility

Validated for HPE ProLiant Gen11 Server Platforms

The HPE P64709-B21 memory module is designed and tested for seamless integration with HPE ProLiant Gen11 series servers, which support DDR5 memory and next-gen CPU architectures. The combination delivers enhanced parallelism, higher DIMM capacity per channel, and improved thermal management.

Thermal Sensors and Power Efficiency

Built-in thermal sensors enable the server to monitor module temperatures in real-time, allowing for intelligent fan speed adjustments and proactive heat management. This capability helps reduce power draw and prevents performance degradation due to overheating or thermal throttling.

Onboard Power Management IC (PMIC)

DDR5 introduces decentralized voltage regulation by placing the Power Management Integrated Circuit (PMIC) directly on the module. This innovation ensures more stable power delivery, reduces motherboard complexity, and enhances system reliability under high memory loads.

Target Applications and Workload Optimization

Enterprise Virtualization and Private Cloud

With 128GB per module and 5600MT/s speed, the P64709-B21 allows enterprise administrators to deploy more virtual machines (VMs) per server node without sacrificing performance. This is especially useful in VMware, Hyper-V, and Citrix environments where memory oversubscription and scalability are critical.

In-Memory Database and Business Intelligence

Applications such as SAP HANA, Oracle TimesTen, and Microsoft SQL Server benefit greatly from high-capacity memory modules. The large memory footprint minimizes reliance on disk-based storage, significantly improving data retrieval times and enabling real-time business analytics.

Scientific Research and High-Performance Computing

The high density and bandwidth of the HPE P64709-B21 make it a perfect match for scientific simulations, genomic sequencing, and computational fluid dynamics (CFD). Memory-intensive models run faster, with greater accuracy, when ample memory is available to avoid swapping or paging delays.

AI, ML, and Data Engineering

AI and ML workloads such as model training, feature extraction, and real-time inference require large in-memory datasets. This memory module supports rapid data pipeline execution, multi-threaded processing, and seamless parallel operations using frameworks like TensorFlow, PyTorch, and Scikit-learn.

Energy Efficiency and Green Computing

Voltage Reduction and Thermal Output

Operating at a lower voltage (1.1V) than its DDR4 predecessor, the HPE P64709-B21 helps reduce energy consumption across multiple modules. This translates to lower electricity bills, reduced carbon footprint, and improved compliance with sustainability standards.

Cooling Optimization and Reduced TCO

By emitting less heat and enabling precise temperature control through server firmware, this memory module allows data centers to operate with lower cooling requirements. This contributes directly to a reduced Total Cost of Ownership (TCO) over time.

Server Memory Installation and Configuration

Channel Interleaving and DIMM Population Rules

To maximize performance, administrators should follow HPE’s memory population guidelines, ensuring symmetrical population across memory channels. This ensures interleaving is enabled, which improves data throughput and system responsiveness.

BIOS Settings for DDR5 Optimization

When deploying DDR5 RDIMMs, it's essential to update server firmware and BIOS to the latest versions that support DDR5 profiles. BIOS settings such as memory training, voltage calibration, and ECC mode configuration should be adjusted to ensure peak performance.

Memory Reliability and Data Protection

Advanced ECC Protection and ODECC

In addition to traditional ECC, DDR5 introduces On-Die ECC (ODECC), which helps correct internal memory array errors before they propagate. This dual-level error correction greatly enhances memory reliability for long-running processes and sensitive computations.

HPE Quality Assurance and Validation

Each HPE memory module is subject to rigorous quality testing, thermal cycling, and validation in HPE's certified labs. This ensures long-term durability, reduced failure rates, and optimized performance under real-world workloads.

Integration with HPE iLO and Memory Monitoring

The memory module can be monitored through HPE Integrated Lights-Out (iLO) for real-time diagnostics, error tracking, and predictive failure alerts. This integration simplifies server health monitoring and supports automated incident response.

Comparison with Other Server Memory Options

128GB vs 64GB and 96GB RDIMM

While 64GB and 96GB modules are suitable for moderate workloads, 128GB RDIMMs like the HPE P64709-B21 are designed for demanding enterprise use cases. The ability to load more memory per DIMM reduces the number of modules required and allows for expanded application memory pools.

DDR5 vs DDR4: Evolution in Performance

DDR5 offers nearly double the bandwidth of DDR4 and introduces new efficiency features like PMIC, higher bank groups, and greater parallelism. These changes translate to faster data access, better scalability, and improved energy efficiency in modern server environments.

Deployment Scalability and Business Value

Flexible Infrastructure Scaling

Deploying high-density modules allows enterprises to scale their infrastructure vertically by maximizing each server node’s memory potential. This reduces hardware costs while increasing processing capacity and VM density per host.

Reduced Downtime and Increased Productivity

Memory errors can lead to application crashes and service disruptions. With built-in ECC and HPE’s proactive health monitoring, the P64709-B21 helps maintain system uptime and ensure uninterrupted productivity for users and business applications.

Ideal for Hybrid and Cloud-Native Architectures

The flexibility and performance offered by the HPE 128GB DDR5 ECC RDIMM make it ideal for hybrid IT setups. Whether running workloads on-premises, in the cloud, or through HPE GreenLake, this module provides the speed and capacity required for dynamic digital operations.