P75947-001 HPE 256GB Quad Rank DDR5-6400MHz PC5-51200 Memory

Overview of P75947-001 HPE 256GB DDR5-6400MHz Smart Memory Module

The P75947-001 HPE 256GB Quad Rank X4 DDR5-6400MHz PC5-51200 Registered Smart Memory module is an advanced enterprise-grade memory solution engineered for high-performance computing, dense workloads, and mission-critical environments. With DDR5 architecture, quad-rank x4 configuration, and an operating speed of 6400MT/s, this 288-pin Registered DIMM (RDIMM) stands at the forefront of next-generation server memory innovations.

Key Features and Specifications

High-Capacity DDR5 Architecture

Built with the latest DDR5 SDRAM technology, the HPE P75947-001 Smart Memory module delivers a massive 256GB capacity in a single DIMM, enabling greater memory density in server systems. DDR5 provides enhanced bandwidth, reduced latency, and superior energy efficiency compared to DDR4.

DDR5 Performance Advantages

• Higher base transfer rate of 6400MT/s (megatransfers per second)
• Improved memory channel efficiency through dual-channel DIMM architecture
• On-die ECC for enhanced reliability
• Higher banks and bank groups for parallelism

6400MHz Speed and PC5-51200 Bandwidth

The P75947-001 module operates at an impressive 6400MHz clock speed, aligning with the PC5-51200 bandwidth class. This ensures optimal data throughput and processing speed for applications in AI, virtualization, cloud workloads, and large-scale analytics. High-speed DDR5 memory enables faster computation cycles, reduced processing latency, and accelerated data access.

Latency Considerations: CL60 Timing

While higher speeds often come with higher latency, the CL60 (CAS Latency) of this module is finely tuned to ensure the most balanced performance profile. It effectively minimizes delay while keeping bandwidth utilization at peak levels.

Quad Rank x4 Configuration

The quad-rank x4 DRAM layout ensures higher capacity and increased reliability. A quad-rank module enables more banks to be accessed concurrently, improving overall system performance in multi-threaded workloads and enhancing cache line efficiency. The x4 data width promotes fault tolerance and better error correction handling, essential in server-grade environments.

1.1V Low-Voltage Operation

Operating at just 1.1V, this DDR5 RDIMM significantly reduces power consumption compared to DDR4's 1.2V modules. The energy efficiency of the P75947-001 is ideal for datacenters striving to optimize power budgets without compromising on performance or reliability.

Registered DIMM (RDIMM) for Enhanced Stability

As a Registered DIMM, the P75947-001 includes a register between the memory controller and the DRAM modules. This buffering minimizes the electrical load on the memory controller, improving signal integrity and supporting higher-capacity configurations in server platforms.

Compatibility and Integration

Designed for HPE ProLiant and Synergy Systems

The P75947-001 memory is fully certified and validated for HPE servers, including the latest HPE ProLiant Gen11 and HPE Synergy compute modules. As part of the HPE Smart Memory lineup, it offers seamless compatibility, automatic recognition in UEFI BIOS, and optimized performance under HPE system management tools.

Compatibility Verification Tools

Use the HPE PartSurfer or QuickSpecs database to confirm compatibility with specific servers and chassis configurations. Only HPE-certified Smart Memory modules like the P75947-001 are supported for full system warranties and hardware support contracts.

Smart Memory Technology Benefits

HPE Smart Memory modules like P75947-001 undergo rigorous qualification testing to ensure unmatched reliability. They support advanced features such as:

• Proactive memory fault prediction
• Advanced memory RAS (Reliability, Availability, Serviceability)
• Memory performance optimization in UEFI firmware
• Automatic DIMM recognition and configuration

Use Cases and Application Scenarios

Enterprise Datacenter Deployments

This 256GB Smart Memory module is ideal for datacenters requiring high-density memory for virtualization, containerization, and multi-tenant hosting. The large memory footprint reduces memory bottlenecks and improves server consolidation ratios.

AI/ML and High-Performance Computing (HPC)

HPC clusters and AI training nodes benefit greatly from high-speed, high-capacity DDR5 modules. The P75947-001's massive bandwidth and reduced latency support parallel processing, in-memory analytics, and real-time inference at scale.

Virtual Machines and Hypervisors

Hypervisors such as VMware ESXi, Microsoft Hyper-V, and KVM can support dozens of virtual machines per node using P75947-001 memory modules. This enables better workload isolation, resource allocation, and fault tolerance across infrastructure layers.

Big Data and In-Memory Databases

Enterprises leveraging in-memory databases such as SAP HANA, Oracle TimesTen, or Apache Ignite can utilize these modules to store vast datasets directly in memory for ultra-fast querying and processing.

Benefits of Using HPE Smart Memory

Reliability and Predictive Fault Detection

Smart Memory modules are designed to predict memory failures and preemptively alert administrators, helping to prevent downtime. The system logs correctable and uncorrectable memory events and triggers failover protocols when needed.

Optimized Firmware Integration

With Smart Memory, the UEFI BIOS configures memory channels automatically based on optimal performance profiles. This eliminates manual tuning and reduces system setup time, especially in blade and rack server configurations.

Improved System Throughput

Advanced memory training algorithms ensure maximum performance from the DDR5 controller, lowering initialization time and boosting boot speeds. Smart Memory integrates with iLO for system-level health monitoring and performance tuning.

Memory Installation Best Practices

Proper DIMM Slot Population

When installing multiple P75947-001 modules, adhere to the server's recommended memory channel population rules. Always balance ranks across channels and maintain symmetry to maximize bandwidth and enable interleaving.

Cooling and Airflow Management

Due to their high density, 256GB RDIMMs can generate significant heat. Ensure adequate airflow, use HPE thermal sensors, and consider high-efficiency cooling solutions in dense rack environments.

Firmware and BIOS Updates

Ensure the server's firmware is up-to-date to support DDR5 Smart Memory fully. Incompatibility or outdated BIOS may lead to boot errors, memory training failures, or performance throttling.

Comparison with Previous-Generation Modules

DDR5 vs. DDR4

• DDR5 offers up to 2x bandwidth compared to DDR4
• Greater efficiency with same or lower voltage
• On-die ECC for higher reliability
• Increased burst length and bank count

256GB DDR5 vs. 128GB DDR4

While 128GB DDR4 modules were previously the peak of capacity per DIMM, DDR5 doubles this threshold while improving thermal performance and bandwidth. Enterprises can now achieve 1TB+ memory per CPU socket more affordably and with fewer modules.

Future-Proofing with DDR5 Technology

Support for 4th and 5th Gen Xeon & EPYC CPUs

The P75947-001 is designed to work with current and upcoming HPE systems that utilize Intel Sapphire Rapids and AMD Genoa platforms, ensuring a smooth upgrade path and compatibility for years to come.

AI and Virtualization-Driven Infrastructure Evolution

As businesses pivot toward AI-driven platforms and software-defined datacenters, high-capacity DDR5 memory like P75947-001 ensures sustained performance under evolving workloads. It enables edge-to-core memory coherence and distributed compute scalability.