Lenovo 4XC7A99190 ConnectX-6 DX 100GbE Dual-Port OCP Ethernet Adapter

Overview

The 4XC7A99190 is a dual-port 100GbE OCP 3.0 Ethernet adapter built on the NVIDIA ConnectX-6 DX silicon, using QSFP56 interfaces — the connector standard that supports both 100GbE and back-compatible 40/50GbE link speeds depending on the cable or transceiver installed. Designed for the OCP 3.0 mezzanine slot found in Lenovo ThinkSystem server platforms, it draws power and PCIe bandwidth directly from the motherboard without consuming a standard PCIe riser slot — a meaningful advantage in dense rack configurations where every slot counts. The QSFP56 form factor supports direct-attach copper (DAC) cables for short intra-rack runs and active optical cables (AOC) or transceivers for longer inter-rack or spine connections, giving you flexibility in how you wire the data path.

Compatibility

This adapter is designed for the OCP 3.0 mezzanine slot in Lenovo ThinkSystem servers that support OCP 3.0 network daughter cards. Verify your specific ThinkSystem platform's OCP slot version and supported adapter list via the Lenovo ServerProven compatibility tool before ordering — OCP 2.0 and OCP 3.0 slots are physically and electrically distinct and are not interchangeable. The QSFP56 ports are compatible with standard QSFP28 DAC cables and transceivers at reduced link speeds, as well as QSFP56 100GbE DAC and optical modules. Consult your switch vendor's compatibility list to confirm QSFP56 interoperability with your top-of-rack switch ports.

Installation Notes

Installation requires access to the OCP 3.0 mezzanine bay on the server motherboard — typically accessed after removing the server top cover and, in some ThinkSystem models, a mid-plane or air baffle. The adapter seats into the OCP slot and is secured with a retention screw; no PCIe riser removal is needed. Country of origin is Mexico. Shipping weight is 1.00 lb.