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Home Networking NVIDIA Quantum-X800 Q3401-RD XDR InfiniBand Spine Switch

NVIDIA Quantum-X800 Q3401-RD XDR InfiniBand Spine Switch

NVIDIA Quantum-X800 Q3401-RD XDR InfiniBand Spine Switch

Brand:

NVIDIA

The Q3401-RD is an NVIDIA Quantum-X800 XDR InfiniBand spine switch built for large-scale AI, HPC, and GPU data-center fabrics. It provides 144 × 800Gb/s ports across 72 OSFP cages, delivering 115.2 Tb/s switching throughput in a 4U air-cooled chassis. Its 48VDC busbar power design makes it particularly relevant to DC-powered AI infrastructure and hyperscale deployments.

OVERVIEW

The NVIDIA Quantum-X800 Q3401-RD is a 4U, air-cooled XDR InfiniBand spine switch delivering 144 × 800Gb/s ports through 72 OSFP cages and 115.2Tb/s switching throughput. It targets large AI and HPC fabrics where high radix, bandwidth, and predictable scaling are critical. Compatibility: Designed for Quantum-X800 XDR InfiniBand environments; verify NIC, cable and transceiver support. Model comparison: Q3401-RD uses 48VDC busbar power, distinguishing it from the AC-powered Q3400-RA.

USE CASES

Large-scale AI clusters: 144 high-speed XDR ports provide dense fabric connectivity for GPU-intensive AI infrastructure.
HPC clusters: High aggregate switching capacity supports demanding east-west traffic between compute nodes and accelerators.
AI factory networking: Provides the high-radix switching layer required for large accelerator fabrics.
GPU cluster spine networking: Consolidates high-speed links into a dense 4U spine architecture.
Hyperscale data centers: 48VDC busbar power aligns with DC-powered infrastructure designs.
Distributed AI infrastructure: High-bandwidth InfiniBand connectivity supports communication-intensive distributed workloads.
Scientific computing: Suitable for tightly coupled workloads requiring high-bandwidth, low-latency fabric connectivity.
Two-level fat-tree fabrics: NVIDIA documents the 144-port architecture as supporting two-level fat-tree topologies capable of connecting up to 10,368 NICs.
High-density network fabrics: 72 OSFP cages provide a dense physical interface design for large-scale deployments.

KEY FEATURES

144 × 800Gb/s XDR ports: High port density provides substantial fabric capacity for large AI and HPC environments.
72 OSFP cages: Each physical OSFP cage accommodates two separate XDR ports, creating a dense 144-port architecture.
115.2Tb/s switching throughput: High aggregate capacity helps prevent the network fabric from becoming the bottleneck as accelerator clusters scale.
NVIDIA Quantum-3 switch ASIC: Provides the underlying switching platform for Quantum-X800 XDR InfiniBand networking.
400Gb/s and 800Gb/s operation: The platform supports 400Gb/s and 800Gb/s per-port speeds, providing deployment flexibility for supported configurations.
48VDC busbar power: Direct DC power input aligns the Q3401-RD with data centers using busbar-based power distribution.
4U air-cooled chassis: Air cooling provides a deployment option for facilities designed around air-cooled high-performance networking.
NVOS software: NVIDIA's network operating system provides the software platform for switch management and operation.
High-radix architecture: The 144-port design supports scalable network topologies for very large GPU and NIC fabrics.
In-network computing capabilities: The Quantum-X800 platform supports hardware-based NVIDIA SHARP v4, adaptive routing, and telemetry-based congestion control for advanced AI networking.

TECHNICAL SPECIFICATIONS

Brand: NVIDIA
Product Family: NVIDIA Quantum-X800
Model: Q3401-RD
Product Type: XDR InfiniBand Spine Switch
Switch ASIC: NVIDIA Quantum-3
InfiniBand Generation: XDR
Maximum Port Speed: 800Gb/s per port
Supported Port Speeds: 400Gb/s, 800Gb/s
Total XDR Ports: 144
Physical OSFP Cages: 72
Switching Throughput: 115.2Tb/s
Port Architecture: 2 XDR ports per OSFP cage
Port Splitting: Not supported
Form Factor: 4U
Rack Mounting: 19-inch rack mount
Dimensions: 6.89 × 17.24 × 33.54 in (H × W × D)
Dimensions: 177.8 × 438 × 852 mm
Cooling: Air-cooled
Airflow: C2P
Power Input: 48VDC busbar
Power Supplies: Busbar powered; no replaceable PSU
Management Software: NVOS
Management Ports: 2 × front management ports
Console: 1 × front console port
USB: 1 × front USB 2.0 Type-A

Why Choose This Product?

115.2Tb/s fabric capacity: Gives large AI and HPC deployments substantial aggregate switching bandwidth.
144-port high radix: Reduces the number of switching tiers required for large-scale fabric designs and supports dense accelerator connectivity.
800Gb/s XDR connectivity: Provides the bandwidth class required by next-generation GPU and AI infrastructure.
DC-powered architecture: The 48VDC busbar design is purpose-aligned with data centers built around direct DC power distribution.
AI-focused networking: Quantum-X800 supports advanced in-network computing capabilities including SHARP v4, adaptive routing, and telemetry-based congestion control.
Dense 4U deployment: Concentrates 144 XDR ports into a single 4U chassis, helping optimize rack-level fabric density.
Scalable topology: NVIDIA identifies the 144-port Q3401-RD architecture as suitable for large two-level fat-tree designs and other topologies reaching tens of thousands of GPUs.
Future-oriented infrastructure: 800Gb/s XDR networking provides a strong bandwidth foundation for scaling accelerator clusters without immediately redesigning the switching layer.

CUSTOMER REVIEW

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