R4M00A HPE Cray ClusterStor HDR 200GB 1 Port Adapter.

HPE R4M00A Cray ClusterStor HDR Adapter Overview

The HPE R4M00A is a high-performance network adapter designed for enterprise-grade computing environments. Engineered to deliver ultra-fast data transfer, it is ideal for demanding workloads in data centers and HPC (High-Performance Computing) setups.

Manufacturer Details

• Brand: HPE
• Model/Part Number: R4M00A
• Category: Network Adapter
• Subtype: Single-Port Configuration

Technical Specifications

Form Factor & Connectivity

• Form Factor: OCP 3.0 Small Form Factor (SFF)
• Bus Interface: PCIe 4.0 x16
• Connector Type: QSFP56
• Total Ports: 1 high-speed port

Data Transmission Capabilities

• Maximum Transfer Rate: Up to 200 Gb/s
• Supported Cables: Direct Attach Copper (DAC) and Active Optical Cables (AOC)

Compatibility & Server Support

• Compatible with HPE ProLiant DL Rack Mount Gen10 Plus Servers
• Optimized for high-performance clusters and storage-intensive workloads

Physical Dimensions

• Length: 21.49 cm
• Width: 24.69 cm
• Height: 6.2 cm

Key Features & Benefits

• Single-port adapter delivering ultra-high throughput for demanding applications
• OCP 3.0 compliance ensures seamless integration in modern data centers
• Supports both DAC and AOC for flexible connectivity options
• PCIe 4.0 x16 interface maximizes server bandwidth utilization
• Compact SFF design saves rack space without compromising performance

Ideal Use Cases

• High-performance computing clusters
• Data-intensive storage environments like Cray ClusterStor systems
• Enterprise servers requiring reliable and fast networking
• Scalable data center deployments with HPE ProLiant servers

HPE R4M00A Cray ClusterStor HDR 200GB 1 Port QSFP OCP3 Adapter for High-Performance Computing Networks

The HPE R4M00A Cray ClusterStor HDR 200GB 1 Port QSFP OCP3 Adapter is purpose-built to deliver ultra-low latency and high-bandwidth interconnect performance in modern high-performance computing environments. Designed to integrate seamlessly with HPE Cray ClusterStor storage architectures and advanced HPC clusters, this adapter enables organizations to unlock the full potential of their parallel file systems, data-intensive workloads, and next-generation compute nodes. As part of the HPE HPC ecosystem, this OCP3 network adapter ensures optimized throughput, minimal communication overhead, and scalable infrastructure for research institutions, enterprise data centers, and AI-driven workloads.

Optimized for ClusterStor and HPC Storage Fabrics

In high-performance computing, storage and network fabric performance are tightly coupled. The HPE R4M00A Cray ClusterStor HDR 200GB Adapter is engineered specifically to enhance the data flow between compute nodes and ClusterStor storage systems. With 200Gb/s HDR InfiniBand capability, the adapter supports demanding applications that require high-speed data movement such as large-scale simulations, weather modeling, genomic sequencing, artificial intelligence training, and financial risk analysis.

ClusterStor environments rely on consistent and deterministic network performance. This adapter provides the required bandwidth density and low latency to ensure that parallel file systems operate efficiently, reducing bottlenecks during massive data transfers. By supporting HDR technology, it enables faster checkpointing, accelerated job completion times, and improved overall system efficiency in large clusters.

200GB HDR InfiniBand Performance and Bandwidth

Ultra-High Throughput for Data-Intensive Workloads

With 200GB HDR InfiniBand connectivity, the HPE R4M00A adapter delivers substantial improvements in bandwidth compared to earlier generation interconnects. High throughput is critical for HPC clusters where multiple compute nodes simultaneously access shared storage pools. The 200Gb/s speed ensures that workloads such as distributed AI training, machine learning model development, and real-time analytics maintain optimal communication rates without network saturation.

This bandwidth level is especially beneficial in environments using parallel file systems such as Lustre, where metadata and data paths must be balanced across the network fabric. The adapter’s performance characteristics help reduce I/O contention and maintain consistent performance across thousands of cores.

Low Latency Communication Architecture

Latency is often more critical than raw bandwidth in HPC applications. The HPE R4M00A Cray ClusterStor HDR 200GB Adapter is engineered with advanced transport acceleration technologies to minimize latency between nodes. Lower latency ensures faster synchronization across distributed workloads, improving application scaling efficiency and cluster responsiveness. Scientific modeling and real-time data processing benefit significantly from this optimized communication pathway.

OCP3 Form Factor Integration and Data Center Efficiency

Open Compute Project 3.0 Compatibility

The OCP3 form factor enables streamlined integration within modern server platforms that support Open Compute Project standards. OCP3 adapters are designed for improved airflow, power efficiency, and simplified cable management compared to traditional PCIe add-in cards. The HPE R4M00A adapter leverages this standard to deliver better thermal characteristics and higher density networking capabilities inside HPC compute nodes.

By adopting OCP3 architecture, organizations can benefit from improved rack-level efficiency, easier serviceability, and enhanced hardware modularity. This ensures long-term scalability and simplified infrastructure upgrades within high-density cluster environments.

QSFP Interface for High-Speed Connectivity

The integrated QSFP port supports HDR InfiniBand connectivity with high-speed cabling solutions, enabling seamless integration into spine-leaf or fat-tree network topologies commonly deployed in HPC clusters. The QSFP interface supports reliable signal integrity over short and long distances depending on cable selection, making it suitable for both intra-rack and inter-rack communication.

Cray ClusterStor Ecosystem Compatibility

Seamless Integration with HPE Cray Systems

The HPE R4M00A adapter is specifically designed to complement HPE Cray supercomputing and ClusterStor storage systems. It integrates with high-performance storage nodes to ensure balanced throughput between compute and storage tiers. This alignment is crucial in environments where sustained data ingestion and retrieval are fundamental to workload success.

By pairing with HPE Cray infrastructure, enterprises can build scalable HPC clusters that support petabyte-scale storage and exascale-ready architectures. The adapter ensures that communication channels remain robust even under peak computational demand.

Support for Parallel File Systems and HPC Software Stacks

Modern HPC environments often utilize parallel file systems that depend on high-speed interconnects. The HPE R4M00A Cray ClusterStor HDR 200GB Adapter supports optimized data exchange across distributed storage arrays, enhancing metadata operations and throughput-intensive workflows. It contributes to improved job scheduling efficiency and faster data staging in cluster environments.

Enterprise-Grade Reliability and Data Integrity

Advanced Error Detection and Correction

Reliability is essential in mission-critical HPC deployments. The HPE R4M00A adapter incorporates advanced error detection mechanisms and link-level correction protocols to maintain stable network communication. This ensures data integrity during large-scale data transfers and reduces the risk of transmission errors that could impact research accuracy or enterprise analytics processes.

High Availability Design for Continuous Operation

Cluster environments often operate continuously, running workloads that may last for days or weeks. The robust design of this HDR 200GB adapter supports sustained operation under high loads, maintaining consistent thermal performance and electrical stability. Its architecture is optimized for long-term deployment in demanding environments where downtime can result in significant operational costs.

Scalability for Expanding HPC Clusters

Enabling Massive Node Counts

As HPC clusters scale from dozens to thousands of nodes, network performance becomes a critical scaling factor. The HPE R4M00A Cray ClusterStor HDR 200GB Adapter supports high-density deployments, enabling clusters to expand without sacrificing communication efficiency. Its HDR capability ensures that network fabric scales proportionally with compute capacity.

Support for Advanced Topologies

Large-scale HPC infrastructures often implement complex topologies such as dragonfly or fat-tree architectures. The QSFP HDR interface supports these designs, enabling flexible network planning and deployment strategies. This adaptability allows data center architects to optimize for latency, redundancy, and power efficiency according to workload requirements.

Power Efficiency and Thermal Optimization

Optimized Power Consumption

Energy efficiency is a priority in modern data centers. The OCP3 form factor and HDR InfiniBand technology combine to deliver high throughput with optimized power usage. This balance reduces operational costs while maintaining top-tier performance, which is essential in facilities operating large-scale compute clusters.

Improved Airflow and Cooling Compatibility

The mechanical design of the HPE R4M00A adapter aligns with server airflow channels, ensuring proper cooling within densely packed racks. Efficient thermal management contributes to hardware longevity and stable performance under heavy computational loads.

Future-Ready Networking for AI and Exascale Computing

Accelerating AI and Machine Learning Workloads

AI and machine learning applications demand rapid data exchange between GPUs, CPUs, and storage arrays. The 200GB HDR connectivity of this adapter supports these high-bandwidth requirements, reducing training time and enhancing model scalability. By minimizing communication bottlenecks, it enables distributed training frameworks to operate more efficiently.

Prepared for Next-Generation Supercomputing

As exascale computing becomes a reality, networking infrastructure must evolve accordingly. The HPE R4M00A Cray ClusterStor HDR 200GB 1 Port QSFP OCP3 Adapter is designed to meet the stringent performance demands of next-generation supercomputers. Its high-speed interconnect and optimized OCP3 architecture provide a foundation for building scalable, high-performance systems capable of handling unprecedented data volumes and computational complexity.

Enhanced Data Movement Across Compute and Storage

Efficient data movement is the cornerstone of high-performance computing. This adapter supports balanced communication across compute clusters and storage subsystems, ensuring that processing power is fully utilized. It minimizes idle CPU cycles caused by network delays, maximizing return on investment for HPC hardware deployments.

Enterprise Deployment Versatility

Whether deployed in academic research institutions, government laboratories, or enterprise data centers, the HPE R4M00A Cray ClusterStor HDR 200GB 1 Port QSFP OCP3 Adapter delivers the reliability and performance required for mission-critical operations. Its integration flexibility, robust architecture, and high-speed connectivity make it an essential component in building advanced HPC storage networks and scalable data-intensive infrastructures.