809085-591 HPE 64GB DDR4 2400Mhz ECC Reg RAM

HPE 809085-591 64GB 2400Mhz PC4-19200 DDR4 SDRAM 

HPE (Hewlett Packard Enterprise) server memory represents the pinnacle of reliability, performance, and compatibility for enterprise computing environments. Designed specifically for HPE ProLiant, Apollo, and Synergy servers, these memory modules undergo rigorous testing and validation to ensure optimal performance in mission-critical applications.

HPE 809085-591 64GB DDR4 Memory Module

The HPE 809085-591 is a high-performance 64GB DDR4 memory module engineered for demanding server workloads. Operating at 2400MHz with PC4-19200 specifications, this memory delivers exceptional bandwidth while maintaining the reliability standards that HPE servers are known for worldwide.

Understanding DDR4 Server Memory Technology

DDR4 memory represents a significant advancement over previous generations, offering improved performance, power efficiency, and reliability features essential for modern data centers and enterprise computing environments.

DDR4 Architecture Benefits

DDR4 technology introduces several architectural improvements that enhance overall system performance. The 2400MHz speed of the HPE 809085-591 provides a data transfer rate of 19.2 GB/s, significantly boosting application responsiveness and throughput for memory-intensive workloads.

DDR4 implements a bank group architecture that allows for more efficient memory access patterns. This design enables simultaneous activation, read, write, and refresh operations across different bank groups, reducing latency and improving overall memory efficiency in server applications.

The inclusion of command address parity detection helps prevent errors in the memory command stream, adding an additional layer of reliability to critical server operations and reducing the potential for system crashes due to command transmission errors.

ECC Registered DDR4 Memory Explained

Error Correcting Code (ECC) memory is essential for server environments where data integrity is paramount. The HPE 809085-591 incorporates advanced ECC technology that can detect and correct single-bit errors while detecting double-bit errors, preventing data corruption and system instability.

How ECC Memory Works

ECC memory includes additional bits beyond the standard data bits to store encrypted codes. When data is written to memory, the ECC code is calculated and stored alongside the data. During read operations, the code is recalculated and compared to the stored code. Any discrepancies trigger automatic correction of single-bit errors or reporting of multi-bit errors.

Registered vs Unbuffered Memory

Registered memory (also known as buffered memory) includes a register between the memory controller and the DRAM modules. This register helps reduce the electrical load on the memory controller, enabling support for higher memory capacities and more DIMMs per channel, which is crucial for scalable server configurations.

Compatibility and Integration

The HPE 809085-591 is specifically engineered for seamless integration with HPE server platforms. Each module undergoes comprehensive compatibility testing to ensure optimal performance and reliability in supported systems.

Proper memory configuration is critical for optimal server performance. HPE provides specific guidelines for populating memory slots to ensure balanced performance across all channels.

When installing the HPE 809085-591 modules, follow HPE's recommended population sequence to maximize memory bandwidth and ensure proper system operation. Typically, this involves populating sockets beginning with the lowest-numbered channel of the lowest-numbered processor.

Mixed Memory Considerations

While HPE memory modules are designed to work together, mixing different speeds or capacities may result in the system operating at the speed of the slowest module. For optimal performance, use identical memory modules throughout the system when possible.

Performance Characteristics

The HPE 809085-591 delivers exceptional performance characteristics that make it ideal for demanding server workloads, from virtualization and database applications to high-performance computing and analytics.

With a data rate of 2400MT/s (million transfers per second) and a 64-bit data bus, the HPE 809085-591 provides a peak theoretical bandwidth of 19.2 GB/s per module. This high bandwidth is essential for data-intensive applications and multi-processor systems where memory performance can become a bottleneck.

In practical terms, the increased bandwidth of 2400MHz DDR4 memory compared to slower alternatives translates to reduced application load times, faster query processing in database applications, improved virtual machine density, and enhanced overall system responsiveness under heavy workloads.

The CAS Latency (CL) of 17 cycles represents the number of clock cycles between a read command and the availability of the first piece of data. While higher than some consumer memory modules, this latency is optimized for server workloads where stability and data integrity are prioritized alongside performance.

Latency vs Bandwidth Trade-offs

Server memory design often involves balancing latency and bandwidth characteristics. The HPE 809085-591 strikes an optimal balance for enterprise workloads, where sustained high bandwidth is typically more valuable than ultra-low latency for most applications.

Reliability and Serviceability Features

HPE server memory incorporates numerous features designed to maximize uptime and simplify maintenance in enterprise environments where system reliability is critical.

HPE Smart Memory Technology

The HPE 809085-591 leverages HPE's Smart Memory technology, which provides enhanced monitoring, reporting, and management capabilities through the integrated Lights-Out (iLO) management controller.

HPE Smart Memory can detect patterns that may indicate impending memory failure, allowing administrators to proactively replace modules before they cause system downtime. This predictive capability is invaluable for maintaining service level agreements in production environments.

Each module includes thermal sensors that monitor operating temperature. The iLO management controller can adjust system cooling or, if necessary, throttle memory performance to prevent overheating, ensuring stable operation even in challenging environmental conditions.

Comprehensive error logging and reporting capabilities help administrators identify and address memory-related issues quickly, reducing mean time to resolution for memory-related problems.

The HPE 809085-591 maintains detailed logs of corrected and uncorrected errors, accessible through HPE Systems Insight Manager (SIM) and iLO management interfaces. These logs provide valuable diagnostic information for troubleshooting intermittent issues.

Configurable alerts can notify administrators of memory errors or predictive failures via email, SNMP traps, or integration with enterprise monitoring systems, enabling rapid response to potential issues.

Use Cases and Applications

The HPE 809085-591 64GB DDR4 memory module is suited for a wide range of enterprise applications where reliability, capacity, and performance are essential.

In virtualized infrastructure, memory capacity often limits virtual machine density. The 64GB capacity of the HPE 809085-591 allows for higher consolidation ratios, enabling more virtual machines per physical host while maintaining performance isolation between workloads.

VMware vSphere and Microsoft Hyper-V

This memory is ideal for hypervisors like VMware vSphere and Microsoft Hyper-V, where ECC protection is recommended to prevent silent data corruption that could affect multiple virtual machines simultaneously.

Database Servers

Database management systems such as Oracle Database, Microsoft SQL Server, and SAP HANA benefit significantly from large memory capacities. The HPE 809085-591 enables larger buffer pools and in-memory processing, reducing I/O bottlenecks and improving query performance.

In-Memory Databases

For in-memory database platforms, the combination of high capacity and ECC protection makes the HPE 809085-591 an excellent choice, ensuring data integrity while maintaining the performance advantages of in-memory processing.

High-Performance Computing

In scientific computing, financial modeling, and engineering simulations, large memory capacities and high bandwidth are essential for processing massive datasets and complex models. The HPE 809085-591 delivers the performance needed for these demanding applications.

Applications such as computational fluid dynamics, finite element analysis, and genomic sequencing benefit from the high capacity and error correction capabilities of the HPE 809085-591, ensuring accurate results from lengthy computations.

Following correct installation procedures is essential for preventing damage to memory modules and ensuring reliable system operation.

Always observe proper ESD precautions when handling memory modules. Use an antistatic wrist strap and work on an ESD-protected surface to prevent damage from static electricity.

Align the notch in the memory module with the key in the memory slot. Apply firm, even pressure to both ends of the module until the retention clips engage automatically. Avoid bending the module during installation.

Keeping server firmware current ensures compatibility and access to the latest memory management features.

Ensure the server system ROM is updated to the latest version before installing new memory modules. Updated system firmware often includes improved memory compatibility and performance enhancements.

ILO Configuration

Configure iLO memory alerts and monitoring to take full advantage of HPE Smart Memory capabilities. Proper configuration ensures timely notification of memory issues before they impact system availability.

When selecting memory for HPE servers, choosing genuine HPE memory ensures compatibility, reliability, and access to HPE's comprehensive support services. The HPE 809085-591 continues HPE's tradition of delivering enterprise-class memory solutions designed specifically for the demanding requirements of modern data centers.