Lenovo 4XC7A86670 NDR OSFP400 1P GEN5 IB Adapter DWC SIO

Lenovo 4XC7A86670 NDR OSFP400 Single-Port Gen5 InfiniBand Adapter DWC SIO

Overview

The Lenovo 4XC7A86670 is a single-port NDR OSFP400 Gen5 InfiniBand adapter designed for direct water-cooled (DWC) server configurations with a SIO (Standard I/O) form factor. This adapter targets high-performance compute environments — HPC clusters, AI training infrastructure, and dense parallel workloads — where 400Gb/s NDR InfiniBand fabric delivers the low-latency, high-bandwidth interconnect that CPU-to-GPU and node-to-node traffic demands at scale. The OSFP400 port format supports next-generation InfiniBand NDR cabling, making 4XC7A86670 the interconnect card to specify when building or expanding a Gen5 IB fabric in a Lenovo ThinkSystem direct water-cooled chassis.

Compatibility

This adapter is engineered for Lenovo ThinkSystem servers and blade/dense compute nodes that support the SIO (Standard I/O) card slot and direct water-cooled thermal architecture. Verify compatibility against the Lenovo ServerProven database for your specific ThinkSystem chassis and system board before ordering — SIO slots are not universal across ThinkSystem generations, and DWC thermal design requires a chassis with active liquid cooling infrastructure. This card is not interchangeable with standard PCIe air-cooled InfiniBand adapters.

Installation Notes

Direct water-cooled adapters require a fully commissioned DWC cooling loop in the target chassis before installation. The SIO form factor is chassis-specific — confirm the slot designation in your ThinkSystem documentation prior to procurement. Country of origin is Mexico; UNSPSC classification 43201404 (network interface cards). Shipping weight is 10.00 lb including packaging.