NVIDIA Mellanox 900-9X81Q-00SN-ST0 ConnectX-8 C8240 SuperNIC | 400GbE/XDR400 | Dual QSFP112 | PCIe Gen6 x16 | Crypto Disabled, Secure Boot
The NVIDIA Mellanox 900-9X81Q-00SN-ST0 is a ConnectX-8 C8240 SuperNIC featuring a dual-port QSFP112 interface on the PCIe Gen6 x16 bus, supporting both 400Gb/s Ethernet and NDR400/XDR400 InfiniBand protocols. This specific variant (SN-ST0) is the Crypto-Disabled version of the C8240, designed for regulated environments where hardware encryption offloads must be restricted, while maintaining Secure Boot functionality for platform integrity.
Engineering Context
The ConnectX-8 architecture resolves I/O bottlenecks in Exascale computing and AI-driven infrastructures. By leveraging the PCIe Gen6 x16 host interface, this SuperNIC doubles the available bandwidth compared to Gen5 predecessors, ensuring that the 400Gb/s data path is not throttled by the host bus. The QSFP112 ports enable next-generation connectivity with 112G SerDes technology, minimizing signal loss over copper and optical links. The card supports NVIDIA's Socket Direct topology, allowing direct access to multi-socket CPUs to reduce latency and improve NUMA performance in dense compute nodes.
Deployment and Use Cases
The 900-9X81Q-00SN-ST0 serves AI and ML training clusters requiring high-bandwidth GPU Direct workloads in NVIDIA DGX systems, Exascale HPC fabrics using XDR400 InfiniBand for ultra-low latency lossless communication, cloud-native infrastructure requiring 400GbE throughput without hardware encryption overhead, and regulated or export-controlled environments where Crypto Disabled hardware is a compliance requirement.
Technical Specifications
OEM: NVIDIA Mellanox
Part Number: 900-9X81Q-00SN-ST0
Model: ConnectX-8 C8240 SuperNIC
Data Rate: 400Gb/s (400GbE / XDR400 InfiniBand)
Ports: Dual QSFP112
Host Interface: PCIe Gen6 x16
Protocol: VPI (Ethernet + InfiniBand)
Security: Secure Boot Enabled, Crypto Disabled
Form Factor: HHHL with Tall Bracket
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS
Compatibility and Hard Constraints
Installing this Gen6 x16 card into a PCIe Gen4 or x8 slot will severely throttle throughput and is not recommended for 400G workloads. This unit is Crypto Disabled and does not support hardware offload for IPsec or TLS. It is functionally identical to 900-9X81Q-00CN-ST0 but without active cryptographic engines. While the hardware supports both InfiniBand and Ethernet, simultaneous mixed-mode operation typically requires specific firmware and driver configurations. Validated for use with NVIDIA Quantum-2 (InfiniBand) and Spectrum-X (Ethernet) switch platforms.
Why Choose T.E.S IT-SOLUTIONS
Each SuperNIC is lab-validated for zero-packet-drop performance. T.E.S IT-SOLUTIONS specializes in refurbished NVIDIA Mellanox networking hardware with expert consultation, global shipping, and comprehensive warranty.