The NVIDIA ConnectX‑9 family of SuperNICs is a next‑generation high‑performance networking solution optimized for hyperscale AI computing workloads. Supporting up to 800 Gb/s InfiniBand and Ethernet connectivity, it significantly boosts system performance in AI factories and cloud data centers. Based on official technical documentation, this article systematically outlines the supported interfaces and compatible optical modules for ConnectX‑9 SuperNICs.
Product Models and Interface Form Factors
ConnectX‑9 SuperNICs are available in multiple variants:
Detailed Description of Core Interfaces
Host Interface (PCIe)
Supports PCIe Gen 6 (backward compatible with Gen 5/Gen 4) through an x16 edge connector, with support for Multi‑Host (up to 4 hosts). The 900‑9X91E‑00EB‑DT0 model additionally supports PCIe Downstream Port Containment (DPC).
Networking Interfaces and Interconnect Solutions
Supports Ethernet (IEEE 802.3) and InfiniBand (Specification 1.7). Network traffic is transmitted through QSFP112 or OSFP connectors. Supports InfiniBand data rates including XDR, NDR, NDR200, HDR, etc., and Ethernet rates of 800/400/200/100 Gb/s. Can be used with DAC, AOC, and optical modules.
Note: OSFP ports support only RHS (flat top, without heatsink) optical modules.
MCIO Connector
Features a 124‑pin MCIO connector (SFF‑TA‑1016). The ST0 model is used for Socket‑Direct expansion, allowing connection to a PCIe expansion card; the DT0 model is used for Downstream Port expansion, allowing connection to NVMe SSDs or other storage devices.
Sideband Management Interface
Provides out‑of‑band management through a 30‑pin IPEX connector with BMC integration. The on‑board trace length is 140 mm for C9240 and 75 mm for C9180 SuperNICs.
PPS and Debugging Interface (Optional)
An optional Cable Extender debugging kit (OPN: 930‑9XCB‑L‑000A‑000) is available, providing access to MTUSB, PPS, NCSI, and other debugging interfaces.
Networking Ports LED Indicators Description
For the description of the networking ports LEDs, follow the table below, depending on the ConnectX-9 SuperNIC you have purchased.
Scheme 1: Single Bi‑Color LED (Yellow/Green)
Scheme 2: Two LEDs (Bi‑Color + Single Green)
Optical Modules for ConnectX‑9 SuperNICs Provided by Tarluz
