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ConnectX-8 NICs

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ConnectX-8 NICs Overview

ConnectX-8 NICs includes two NVIDIA ConnectX-8 InfiniBand and Ethernet SuperNICs and one Socket Direct auxiliary kit. The SuperNICs use HHHL PCIe cards with tall brackets, PCIe Gen6 x16 host interfaces, and optional additional x16 Socket Direct connectivity. Network configurations span 400Gb/s NDR through dual QSFP112 ports and 800Gb/s XDR through a single OSFP cage, with Ethernet modes also supported. The auxiliary kit extends the PCIe connection through an MCIO harness for dual-socket and multi-host systems. These products serve B200 and GB200 clusters, AI servers, and PCIe 6.0 x16 platforms.

C8180 (900-9X81E-00EX-ST0) is an HHHL ConnectX-8 SuperNIC with a single OSFP cage. It operates in 800Gb/s XDR InfiniBand by default and supports 2×400GbE Ethernet configuration using 200Gb/s-per-lane signaling. The card connects through PCIe Gen6 x16 and supports an additional x16 Socket Direct interface through an auxiliary connection kit. This crypto-enabled, Secure Boot-enabled configuration is supplied with a tall bracket for high-bandwidth AI server and GPU cluster networking.

C8240 (900-9X81Q-00CN-ST0) is an HHHL ConnectX-8 SuperNIC with two QSFP112 network ports. It supports NDR InfiniBand and 400GbE Ethernet, with Ethernet configured as the default link type and 100Gb/s-per-lane signaling used for the high-speed interfaces. The card provides a PCIe Gen6 x16 host connection and an x16 Socket Direct extension option. It includes crypto and Secure Boot capabilities and is supplied with a tall bracket for AI server and dual-socket platform integration.

C8180X (930-9XAX6-0025-000) is a Socket Direct and Multi-Host auxiliary kit for ConnectX-8 SuperNIC configurations. It provides an auxiliary PCIe connection card and a 250mm MCIO harness, allowing the SuperNIC’s additional x16 PCIe interface to connect through a second server slot. The package includes both tall and short auxiliary-card brackets. It supports dual-socket and multi-host architectures in which each processor accesses the network through a dedicated PCIe interface.

FAQ

What are the main interface and default-link differences between C8180 (900-9X81E-00EX-ST0) and C8240 (900-9X81Q-00CN-ST0) in the ConnectX-8 NICs category?

C8180 uses one OSFP cage and defaults to one 800Gb/s XDR InfiniBand port; it can be reconfigured as two 400GbE ports. C8240 uses two QSFP112 cages and defaults to two 400GbE Ethernet ports, with NDR InfiniBand configurations also supported.

Can C8180 (900-9X81E-00EX-ST0) operate in Ethernet mode although its factory-default link type is 800Gb/s XDR InfiniBand?

Yes. C8180 can be reconfigured from one 800Gb/s XDR InfiniBand port to two 400GbE Ethernet ports. NVIDIA also documents four 200GbE and eight 100GbE Ethernet configurations; a reboot or power cycle is required for the new configuration to take effect.

Which Ethernet and InfiniBand port configurations are available through the two QSFP112 cages on C8240 (900-9X81Q-00CN-ST0)?

It defaults to two 400GbE Ethernet ports. Available alternatives include eight 100GbE Ethernet ports, one or two 400Gb/s NDR InfiniBand ports, and one or two 400Gb/s XDR Lite InfiniBand ports.

What host-side PCIe connections are used by C8180 (900-9X81E-00EX-ST0) and C8240 (900-9X81Q-00CN-ST0) for standard and extended configurations?

Both use a primary PCIe Gen6 x16 edge connection. An optional auxiliary card and MCIO harness add a second x16 PCIe path, allowing the SuperNIC’s 32-lane PCIe bus to be presented through two x16 interfaces for supported extension configurations.

What components are included with the C8180X (930-9XAX6-0025-000) Socket Direct and Multi-Host auxiliary kit?

It includes one PCIe x16 auxiliary connection card, one 250mm MCIO cable, one short auxiliary-card bracket, and one tall bracket installed on the auxiliary card. The kit is listed as a separately purchased auxiliary accessory.

How does C8180X (930-9XAX6-0025-000) provide an additional PCIe connection in dual-socket or multi-host server architectures?

It connects the SuperNIC’s second x16 PCIe interface to another PCIe x16 slot through the 250mm MCIO harness. In a Socket Direct design, this lets each CPU in a dual-socket server access the network through a dedicated PCIe interface.

Do C8180 (900-9X81E-00EX-ST0) and C8240 (900-9X81Q-00CN-ST0) include Secure Boot and crypto-enabled capabilities?

Yes. Both specified OPNs are documented with Secure Boot enabled and crypto enabled. These capabilities apply to the C8180 900-9X81E-00EX-ST0 and C8240 900-9X81Q-00CN-ST0 configurations.

What server installation conditions and card dimensions apply to C8180 (900-9X81E-00EX-ST0) and C8240 (900-9X81Q-00CN-ST0)?

Use a server PCIe x16 slot that can provide the required power and airflow. The documented operating range is 0°C to 55°C. C8180 measures 68.50 × 168.40mm, while C8240 measures 66.40 × 168.40mm; both are HHHL cards.

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