Lenovo 4XC7A86671 NDR OSFP400 1P GEN5 IB Adapter DWC

Lenovo 4XC7A86671 NDR OSFP400 Single-Port Gen5 InfiniBand Adapter DWC

Overview

The Lenovo 4XC7A86671 is a single-port NDR OSFP400 Gen5 InfiniBand adapter designed for direct water-cooled (DWC) server configurations. This adapter targets high-performance computing and AI/ML cluster deployments where 400Gb/s NDR InfiniBand fabric bandwidth is required and thermal constraints make air-cooled adapters impractical. The 4XC7A86671 integrates into Lenovo's DWC server ecosystem, channeling heat into the liquid-cooling loop rather than adding to chassis airflow load — critical in dense rack configurations where every watt of heat removal matters.

Compatibility

This adapter is engineered for Lenovo ThinkSystem servers with direct water-cooling support. Target platforms include Lenovo ThinkSystem SD650 V3 and similarly configured DWC nodes within the Neptune liquid-cooled infrastructure. Verify your specific server's PCIe Gen5 slot availability and DWC manifold compatibility before ordering — not all ThinkSystem chassis support the DWC thermal interface this adapter requires. The OSFP400 port requires an NDR-capable InfiniBand switch fabric and corresponding NDR OSFP cables or transceivers; existing HDR infrastructure is not forward-compatible without switch upgrades.

Installation Notes

Installation requires a Lenovo-supported DWC chassis with an active liquid-cooling manifold connection point for the adapter's cold plate. Standard PCIe card installation procedures apply, but the DWC thermal interface must be properly seated and leak-tested before system power-on — follow Lenovo's ThinkSystem DWC installation documentation for torque specifications and coolant line connection procedures. Country of origin is Mexico (MX). Shipping weight is 10.00 lb, which accounts for packaging and any included thermal interface hardware.