NVIDIA Quantum-2 QM9790 Series NDR 400G InfiniBand Switch
1. MQM9790-NS2F Product Overview
The NVIDIA Quantum-2 QM9790 Series is a high-performance, 1U form factor InfiniBand switch designed for next-generation AI and HPC data centers. It delivers 64 ports of NDR 400Gb/s InfiniBand connectivity, offering a total bidirectional bandwidth of 51.2 Tb/s and over 66.5 billion packets per second (BPPS) of embedded throughput. Ideal for large-scale deployments, it supports advanced features like RDMA, dynamic routing, and NVIDIA SHARPv3™.
2. MQM9790-NS2F Key Features
- 64 ports of NDR 400Gb/s InfiniBand in a 1U chassis
- 51.2 Tb/s aggregate bidirectional bandwidth
- Support for SHARPv3 in-network computing
- Port splitting capability for 128 x 200Gb/s (NDR200) ports
- Advanced management via MLNX-OS or UFM® platform
- Backward compatibility with previous InfiniBand generations
3. MQM9790-NS2F Core Technologies
The QM9790 leverages NVIDIA's latest InfiniBand NDR technology, including SHARPv3 for scalable in-network aggregation, RDMA for low-latency data transfer, and advanced congestion control. It supports various network topologies such as Fat Tree, SlimFly, DragonFly+, and multi-dimensional Torus.
4. MQM9790-NS2F Working Principle
The switch uses OSFP connectors and supports both passive and active copper or optical cables. It employs a non-blocking architecture to ensure full bandwidth across all ports. SHARPv3 enables distributed reduction operations within the network, significantly reducing data movement and accelerating AI and HPC workloads.
5. Applications
Ideal for AI training clusters, high-performance computing, scientific research, and large-scale cloud data centers. Supports real-time data processing, high-resolution simulations, and massively parallel algorithms.
6. Specifications & Selection Guide
| Model | Ports | Speed | Power (Max) | Airflow |
| MQM9790-NS2F | 64 | 400Gb/s | 1084W | Front to Back |
| MQM9790-NS2R | 64 | 400Gb/s | 1084W | Back to Front |
7. Advantages
- 32x AI acceleration improvement with SHARPv3 vs. previous generation
- High port density reduces cabling and rack space
- Low latency and high throughput for demanding workloads
- Flexible topology support and backward compatibility
8. Service & Support
We offer 1-year warranty, 24/7 technical support, fast delivery, and integration services. Our team ensures smooth deployment and ongoing maintenance.
9. FAQ
Q: What is the maximum number of nodes supported?
A: Up to 2000 nodes with the built-in subnet manager.
Q: Is the QM9790 compatible with older InfiniBand generations?
A: Yes, it is backward compatible with EDR and HDR InfiniBand.
Q: Can the ports be split?
A: Yes, each 400Gb/s port can be split into two 200Gb/s ports.
10. Precautions
- Operating temperature: 0°C to 40°C
- Humidity: 10% to 85% non-condensing
- Ensure proper airflow direction (P2C or C2P)
- Use certified cables for optimal performance
11. Company Introduction
With over 10 years of industry experience, we operate a large factory and maintain a strong technical team. We are a trusted partner for leading brands including Mellanox, Ruckus, Aruba, and Extreme. Our product range includes network switches, network cards, wireless access points, controllers, and cables. We hold over $10 million in inventory, ensuring reliable supply and competitive pricing. Our professional sales and technical support team is available 24/7 to assist with product selection, deployment, and troubleshooting.
