NVIDIA 920-9K33R-00MV-GS0 GB300 NVLink Switch Tray, 144 Internal NVLink5 Ports, Model N5500_LD, 1U: This is a 1U integrated NVLink switch tray designed exclusively for the NVIDIA GB300 computing platform. The N5500_LD aggregates 144 internal NVLink5 ports to create a high-bandwidth switching fabric within a GB300 rack-scale system. This is not a standard Ethernet or InfiniBand switch — it is a memory-semantic fabric device that enables unified GPU memory access across the Blackwell Superchip ecosystem. This is a refurbished unit.
Engineering Context
The N5500_LD tray operates at the NVLink5 protocol layer, providing bandwidths far exceeding standard networking protocols. It enables GB300 GPUs to access peer memory at native speeds, effectively merging multiple GPUs into a single massive accelerator. The 144 internal ports are blind-mate backplane or midplane connections within the rack structure — these are not user-facing ports for external cabling. The tray is the core switching fabric component for NVL72/NVL36 rack-scale GPU clusters. NVOS version 25.02.1874 or later is required to initialize the NVLink5 SerDes lanes.
Deployment & Use Cases
Core switching fabric for NVIDIA GB300 NVL72/NVL36 rack-scale systems. Enabling model parallelism across GPU domains in trillion-parameter AI training. High-speed memory-semantic interconnect for Blackwell B200/GB200 configurations. Replacement or expansion of the switching layer in Grace-Blackwell Superchip clusters.
Technical Specifications
- OEM: NVIDIA
- Part Number: 920-9K33R-00MV-GS0
- Model ID: N5500_LD
- Type: NVLink5 Switch Tray
- Port Count: 144 Internal NVLink5 Ports
- Form Factor: 1U Integrated Switch Tray
- Minimum OS: NVOS 25.02.1874 or higher
- Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility & Hard Constraints
GB300 Only: This switch tray is designed exclusively for NVIDIA GB300 NVL rack systems. It does not work with standalone PCIe servers, H100/A100 systems, or standard Ethernet/InfiniBand networks. NVLink5 Protocol: Not backward-compatible with NVLink4 (Hopper) or earlier NVLink generations. Firmware Dependency: Will fail to initialize if the rack management controller runs NVOS versions prior to 25.02.1874. Internal Only: The 144 ports are blind-mate rack backplane connections, not external patch panel ports. Handling: Contains sensitive exposed connectors on the rear interface — use extreme caution during installation to avoid pin damage.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS specializes in advanced NVIDIA infrastructure including NVLink switch trays, Quantum switches, and ConnectX adapters. We validate every unit for connector integrity and provide expert consultation on NVLink topology planning, global shipping, and comprehensive warranty.