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64-Port NDR Managed Switch with 51.2 Tb/s Throughput | P2C Airflow for HPC & AI Data Centers
Product Overview
The NVIDIA Quantum-2 QM9790-NS2F belongs to the QM9700 series of fixed-configuration switches, setting a new benchmark for 400Gb/s InfiniBand performance. Housed in a compact 1U chassis, this managed switch delivers 64 non-blocking ports at 400Gb/s per port, translating to an aggregate bidirectional throughput of 51.2 terabits per second. Designed to meet extreme-scale AI and high-performance computing demands, the QM9790 integrates advanced in-network computing via NVIDIA SHARPv3 technology, adaptive routing, RDMA, and congestion control. The "NS2F" variant indicates power-to-connector (P2C) airflow, ideal for data centers requiring front-to-rear cooling.
Key Features
64 ports of 400Gb/s NDR: Full bisectional bandwidth in a 1U form factor; up to 128 ports at 200Gb/s via port-split technology
51.2 Tb/s aggregate throughput: + 66.5 billion packets per second (BPPS) capacity, zero packet loss
NVIDIA SHARPv3: In-network computing reduces data movement, accelerating AI collective operations by up to 32x over prior generation
On-Board Subnet Manager: Manages up to 2,000 nodes out of the box, simplifies fabric bring-up
Low latency & RDMA: Enables efficient GPU direct communication, ideal for AI training clusters
Backward compatible: With previous InfiniBand generations (HDR, EDR)
Technology: In-Network Computing & SHARPv3
NVIDIA Quantum-2 platforms integrate the third generation of Scalable Hierarchical Aggregation and Reduction Protocol (SHARPv3). Unlike conventional networking where data must travel back and forth between compute and storage, SHARPv3 performs data reductions inside the network fabric. For AI and scientific workloads, this reduces the volume of data traversing the fabric, dramatically improving runtime performance. Combined with Remote Direct Memory Access (RDMA) and adaptive routing, the QM9790-NS2F eliminates congestion hot spots and extracts maximum throughput from GPU clusters.
Typical Deployments
AI & Deep Learning Clusters: Large-scale GPU-accelerated environments (NVIDIA DGX SuperPOD, mainstream AI factories)
High-Performance Computing (HPC): Research institutions, weather modeling, molecular dynamics, and computational fluid dynamics
Hyperscale Data Centers: Efficient spine-leaf architectures using Fat Tree or DragonFly+ topologies
Cloud & Enterprise Data Centers: High-frequency trading, big data analytics, and real-time simulation
Higher Education & Research Labs: Scalable InfiniBand fabric for academic HPC clusters
Specifications
Parameter
QM9790-NS2F Specification
Port Speed
400Gb/s (NDR) per port, 64 non-blocking ports (32 OSFP connectors)
Aggregate Throughput
51.2 Tb/s bidirectional
Packet Forwarding Capacity
>66.5 billion packets per second (BPPS)
Form Factor
1U rackmount; Height: 1.7 in (43.6 mm) x Width: 17.0 in (438 mm) x Depth: 26.0 in (660.4 mm)
Weight
14.5 kg (approx 32 lbs)
Power Supply
1+1 redundant hot-swappable, 200-240Vac, 80 PLUS Gold+ certified, ENERGY STAR
1x USB 3.0, 1x RJ45 (ETH), 1x RJ45 (UART), 1x USB for I2C
Software
MLNX-OS (managed, full CLI/WebUI/SNMP/JSON)
Operating Temperature
0°C to 40°C
Product Compliance
RoHS, CE, FCC, cTUVus, CB, VCCI, ICES, RCM
Warranty
1 year (extended support available through Starsurge)
Frequently Asked Questions
Q: What is the difference between QM9790-NS2F and QM9700-NS2F?
A: QM9790-NS2F is an unmanaged switch designed for environments where external fabric manager (NVIDIA UFM) handles control plane, while QM9700 includes an on-board subnet manager for standalone management up to 2000 nodes. Both offer identical port density and performance.
Q: Can I use QM9790-NS2F with 200G adapters?
A: Yes, using port-split technology, each 400G OSFP port can split into 2x200Gb/s, effectively providing up to 128 ports of 200G. Compatible with NVIDIA ConnectX-6 HDR adapters.
Q: Which optics/cables are officially compatible?
A: The switch supports OSFP connectors; passive/active copper cables, active fiber cables, and optical modules. We recommend NVIDIA-qualified cables for maximum reliability.
Precautions
Ensure facility provides 200-240Vac power input - the switch does not support 110V
Confirm airflow direction: P2C (NS2F) is front-to-rear (cold aisle intake)
Operating altitude up to 3050m; do not exceed environmental temperature 40°C for sustained performance
Use only compatible optical modules and cables to prevent damage to OSFP ports
Company Introduction
Hong Kong Starsurge Group Co., Limited - founded in 2008, is a technology-driven provider of network hardware, IT services, and system integration solutions. Serving governments, healthcare, manufacturing, education, finance and global enterprises, Starsurge delivers network switches, NICs, wireless access points, controllers, cabling, IoT solutions, and custom software development.
Buyer Checklist
Confirm airflow direction (P2C or C2P) matches your rack layout
Verify power input: 200-240V AC redundant feeds
Select cable type and length based on node distance
Determine if on-board subnet manager (QM9700) or external UFM (QM9790) is needed
Check warranty extension options for 3-5 years coverage
Hong Kong Starsurge Group Co.
Leading IT Solutions Provider & System Integrator Since Establishment
Hong Kong Starsurge Group Co. is a technology-driven enterprise specializing in IT network system integration, IoT solutions, and custom software development. With extensive industry expertise ac...
Hong Kong Starsurge Group Co.
Leading IT Solutions Provider & System Integrator Since Establishment
Hong Kong Starsurge Group Co. is a technology-driven enterprise specializing in IT network system integration, IoT solutions, and custom software development. With extensive industry expertise ac...
