NVIDIA Mellanox® 920-9K33R-00MV-GS0 GB300 NVLink Switch Tray: This is the dedicated N5500_LD NVLink Switch Tray solution designed exclusively for the NVIDIA GB300 computing platform. Occupying a 1U form factor, it aggregates 144 internal NVLink5 ports to create a massive, high-bandwidth switching fabric. This tray is the physical interconnect layer that enables the unified memory architecture of the Blackwell Superchip ecosystem, effectively merging multiple GPUs into a single massive accelerator.
🔧 Technical Specifications
OEM: NVIDIA
P/N: 920-9K33R-00MV-GS0
Model ID: N5500_LD
Form Factor: 1U Integrated Switch Tray
Port Count: 144 Internal NVLink5 Ports
Architecture: NVLink Switch System for GB300
Min OS Requirement: NVOS 25.02.1874 or higher
🌐 Engineering Context: The N5500_LD tray is not a standard Ethernet switch; it is a memory-semantic fabric device. By utilizing NVLink5 technology, it provides bandwidths far exceeding standard networking protocols, allowing GB300 GPUs to access peer memory at native speeds. This component is the "glue" of the NVL72/NVL36 rack-scale architecture, ensuring that the GPU cluster operates with linear scalability for trillion-parameter AI model training.
🧠 Typical Use Cases
Core switching fabric for NVIDIA GB300 NVL72/NVL36 Rack-Scale systems.
Enabling model parallelism across 144 GPU domains.
High-speed memory semantic interconnects for Blackwell B200/GB200 configurations.
Replacement or expansion of the switching layer in Grace-Blackwell Superchip clusters.
 
✅ Compatible With: NVIDIA GB300 NVL Rack Systems. (Strictly requires NVOS version 25.02.1874 or newer to initialize the NVLink5 SerDes lanes)
❌ NOT Compatible With: Standalone PCIe servers; Legacy H100/A100 NVLink bridges; Standard Ethernet or InfiniBand networks (This is a dedicated internal NVLink fabric device).
 
🛠️ Installation & Architecture
Firmware Dependency: This unit will fail to initialize or train links if the system management processor is running NVOS versions prior to 25.02.1874. Verify the rack management controller version before insertion.
Internal Routing: The "144 Internal Ports" refers to the copper backplane or midplane connections within the rack structure. These are not user-facing ports for external cabling but blindly mate with the rack's spine architecture.
Handling: As a high-density switch tray, this unit contains sensitive exposed connectors on the rear interface. Use extreme caution during the slide-in installation process to avoid pin damage.
 
🤝 Why Choose T.E.S IT-SOLUTIONS? We specialize in the most advanced tier of NVIDIA infrastructure. From legacy interconnects to bleeding-edge Blackwell architecture, our components are validated for critical AI workflows. We offer expert consultation on complex NVLink topologies, fast worldwide shipping, and a comprehensive warranty to ensure your supercomputing cluster runs without compromise.