Mellanox MQM9790-NS2F NVIDIA Quantum-2 400Gb/s NDR InfiniBand Switch (64-Port)

Overview

The Mellanox MQM9790-NS2F is a high-performance NVIDIA Quantum-2 InfiniBand switch designed for AI clusters, high-performance computing (HPC), and hyperscale data centers.

Built around the NVIDIA Quantum-2 switching ASIC, it delivers ultra-low latency and massive bandwidth to support modern workloads such as AI training, distributed computing, cloud infrastructure, and scientific simulations.

With 64 ports of 400Gb/s NDR InfiniBand connectivity in a compact 1U rack-mount form factor, the switch enables extremely dense and scalable networking fabrics for next-generation compute environments.

Key Features

• 64 × NDR 400Gb/s InfiniBand ports

• 51.2 Tb/s aggregate offerirectional bandwidth

• Ultra-low latency (~300 ns switching)

• 32 × OSFP connector cages

• Port splitting support (up to 128×200Gb/s)

• 1U rack-mount design

• Redundant hot-swappable power supplies

• Advanced congestion control and adaptive routing

• Designed for AI, HPC, and large data centers

These switches are commonly deployed in supercomputers, GPU clusters, and large-scale research facilities where extremely fast interconnects are required.

Technical Specifications

Ports

64 × NDR 400Gb/s

Connectors

32 × OSFP

Total Throughput

51.2 Tb/s

Packet Processing

~66.5 billion packets/sec

Form Factor

1U Rack Mount

Power Supplies

Dual redundant (hot-swappable)

Power Consumption

Up to ~1720W

Cooling

Multiple hot-swappable fan modules

Airflow

P2C H × 17” W × 26” D

Weight

~32 lbs

Advanced Technologies

The Quantum-2 platform includes several advanced networking technologies:

SHARP In-Network Computing

Allows data reduction and aggregation inside the network fabric, accelerating distributed computing tasks such as AI training.

RDMA (Remote Direct Memory Access)

Enables servers to communicate directly with each other’s memory without CPU involvement, dramatically reducing latency.

Adaptive Routing

Automatically reroutes traffic around congestion for better performance in large clusters.

These capabilities make InfiniBand switches like the MQM9790 essential for GPU-accelerated computing environments.

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Typical Applications

This switch is commonly used in:

• AI and machine learning clusters

• Supercomputers

• Large GPU farms

• High-frequency trading infrastructure

• Hyperscale data centers

• Scientific research networks

• Cloud service provider fabrics

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Physical Description

• Front panel: Dense OSFP port layout supporting ultra-high-speed cables

• Rear panel: Redundant hot-swap power supplies and high-performance cooling

• Chassis: Industrial rack-mount design for data center environments.

Interesting fact:

A single MQM9790 switch can handle over 51 terabits per second, enough bandwidth to move the equivalent of thousands of 4K video streams simultaneously.

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