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Home Networking HPE NVIDIA MQM9790-NS2F 400Gb/s NDR InfiniBand Switch

HPE NVIDIA MQM9790-NS2F 400Gb/s NDR InfiniBand Switch

HPE NVIDIA MQM9790-NS2F 400Gb/s NDR InfiniBand Switch

Brand:

NVIDIA Mellanox

The HPE P45691-B21 / NVIDIA MQM9790-NS2F is a 1U Quantum-2-based NDR InfiniBand switch designed for high-density AI, HPC, and data-center fabrics. It provides 64 NDR ports at 400Gb/s through 32 OSFP cages, with unmanaged/external fabric management and power-to-connector (P2C) forward airflow. Its 51.2 Tb/s bidirectional switching capacity makes it suitable for scalable GPU and high-performance compute interconnects.

OVERVIEW

The MQM9790-NS2F is a 1U NVIDIA Quantum-2 NDR InfiniBand switch for dense AI/HPC fabrics, offering 64 × 400Gb/s NDR ports via 32 OSFP cages and 51.2Tb/s bidirectional throughput. Compatibility: designed for NDR InfiniBand fabrics and corresponding OSFP-based infrastructure. Model comparison: MQM9790-NS2F is unmanaged with P2C airflow; MQM9700-NS2F is the managed counterpart.

USE CASES

AI GPU training clusters - Provides high-density 400G NDR connectivity for distributed GPU workloads where fabric bandwidth can become a major scaling constraint.
High-performance computing (HPC) - Creates a high-throughput InfiniBand fabric for compute-intensive scientific and engineering workloads.
Large-scale AI infrastructure - 64 NDR ports in a 1U chassis help increase fabric port density while conserving valuable rack space.
GPU-to-GPU and server-to-server fabric connectivity - 400Gb/s NDR ports provide the high-speed interconnect required by modern accelerated computing environments.
AI cluster spine/fabric deployments - High aggregate switching capacity supports scalable fabric architectures as additional compute nodes are introduced.
Data-intensive research environments - Suitable for environments moving large datasets between compute resources where high network throughput is commercially important.
Externally managed InfiniBand fabrics - The unmanaged MQM9790 architecture fits deployments where fabric management is provided externally rather than through an internally managed switch model.
Data-center racks requiring P2C airflow - Forward power-to-connector airflow can be selected when the rack's thermal design calls for this airflow direction.

KEY FEATURES

64 × 400Gb/s NDR InfiniBand ports
32 OSFP cages
51.2Tb/s bidirectional throughput
NVIDIA Quantum-2 architecture
Unmanaged switch configuration
P2C forward airflow
1U rack form factor
High-speed NDR InfiniBand connectivity
Designed for AI and HPC environments
High-density GPU cluster networking
Suitable for scalable data center fabrics
HPE OEM configuration

TECHNICAL SPECIFICATIONS

Brand: NVIDIA Mellanox
Product Family: NVIDIA Quantum-2 QM9790
System Model: QM9790
Legacy OPN / Model: MQM9790-NS2F
HPE SKU: P45691-B21
NVIDIA SKU: 920-9B210-00FN-0D0 per current NVIDIA documentation
Product Type: NDR InfiniBand switch
InfiniBand Generation: NDR
Port Count: 64 NDR ports
Port Speed: Up to 400Gb/s per NDR port
Physical Connector Cages: 32 OSFP
Aggregate Bidirectional Throughput: Up to 51.2Tb/s
Unidirectional Switching Capacity: 25.6Tb/s
Management: Unmanaged / externally managed
Airflow: Power-to-connector (P2C), forward
Form Factor: 1U rack-mount
Architecture: NVIDIA Quantum-2
Deployment Compatibility: NDR InfiniBand fabric; verify OSFP transceivers/cables and host adapters for the intended topology
Lifecycle Status: Mass Production
Alternative Managed Model: MQM9700-NS2F - 64-port NDR, 32 OSFP, managed, P2C
Alternative Reverse-Airflow Model: MQM9790-NS2R - 64-port NDR, 32 OSFP, unmanaged, C2P
Related Managed Reverse-Airflow Model: MQM9700-NS2R - 64-port NDR, 32 OSFP, managed, C2P

Why Choose This Product?

High-density 400G connectivity - 64 NDR ports provide substantial connectivity in a compact 1U chassis.
Built for AI and HPC fabrics - NDR InfiniBand is suited to infrastructure where distributed compute requires high-bandwidth interconnects.
51.2Tb/s aggregate capacity - Provides significant switching capacity for large-scale east-west traffic between compute nodes.
Space-efficient deployment - 1U form factor helps maximize rack utilization as GPU and compute clusters grow.
External-management architecture - A strong fit for organizations whose InfiniBand fabric management is handled through an external management strategy.
Correct airflow for P2C racks - The NS2F variant can be selected specifically for power-to-connector forward-airflow environments.
HPE OEM procurement path - P45691-B21 gives HPE customers a recognizable OEM SKU for sourcing and infrastructure standardization.
Scalable Quantum-2 platform - Provides a high-performance networking foundation for expanding AI/HPC environments rather than requiring a low-bandwidth networking refresh as cluster demands increase.

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