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About This Manual

This User Manual describes NVIDIA® ConnectX®-6 Lx Ethernet adapter cards. It provides details as to the interfaces of the board, specifications, required software and firmware for operating the board, and relevant documentation.

Ordering Part Numbers

The table below provides the ordering part numbers (OPN) for the available ConnectX-6 Lx Ethernet adapter cards.

NVIDIA SKULegacy OPNSupported SpeedPort TypePCIe InterfaceCrypto Secure BootBracket
900-9X662-0053-ST1MCX631102AN-ADAT 25GbEDual-port SFP28PCIe 4.0 x8--Tall Bracket
900-9X662-0083-ST0MCX631102AC-ADAT25GbEDual-port SFP28PCIe 4.0 x8Tall Bracket
900-9X662-0073-ST0MCX631102AS-ADAT25GbEDual-port SFP28PCIe 4.0 x8-Tall Bracket

Legacy (EOL) Ordering Part Numbers

NVIDIA SKULegacy OPNSupported SpeedPort TypePCIe InterfaceCrypto Secure BootBracket
900-9X662-0063-ST0  MCX631102AE-ADAT25GbEDual-port SFP28PCIe 4.0 x8-Tall Bracket
900-9X601-0025-ST0MCX631105AE-GDAT50GbESingle-port QSFP28PCIe 4.0 x8-Tall Bracket
900-9X601-0015-SQ0MCX631105AN-GDAT 50GbESingle-port QSFP28PCIe 4.0 x8--Tall Bracket


50GbESingle-port QSFP28PCIe 4.0 x8Tall Bracket

Intended Audience

This manual is intended for the installer and user of these cards. The manual assumes basic familiarity with Ethernet network and architecture specifications.

Technical Support

Customers who purchased NVIDIA products directly from NVIDIA are invited to contact us through the following methods:

Customers who purchased NVIDIA M-1 Global Support Services, please see your contract for details regarding Technical Support.
Customers who purchased NVIDIA products through an NVIDIA-approved reseller should first seek assistance through their reseller.

Related Documentation

NVIDIA MLNX_OFED for Linux User Manual and Release NotesUser Manual and Release Notes describing MLNx_OFED features, performance, band diagnostic, tools content and configuration. See NVIDIA MLNX_OFED for Linux Documentation.
WinOF-2 for Windows User Manual and Release NotesUser Manual describing WinOF-2 features, performance, Ethernet diagnostic, tools content and configuration. See WinOF-2 for Windows Documentation.
NVIDIA VMware for Ethernet User Manual and Release NotesUser Manual describing the various components of the NVIDIA ConnectX® NATIVE ESXi stack. See VMware® ESXi Documentation.
NVIDIA Firmware UpdateNVIDIA firmware update and query utility used to update the firmware. See NVIDIA Firmware Utility (mlxup) Documentation.
NVIDIA Firmware Tools (MFT) User ManualUser Manual describing the set of MFT firmware management tools for a single node. See MFT User Manual.
IEEE Std 802.3 SpecificationIEEE Ethernet Specifications
PCI Express SpecificationsIndustry Standard PCI Express Base and Card Electromechanical Specifications.
LinkX Interconnect SolutionsLinkX Ethernet cables and transceivers are designed to maximize the performance of High-Performance Computing networks, requiring high-bandwidth, low-latency connections between compute nodes and switch nodes. NVIDIA offers one of the industry’s broadest portfolio of 40GbE, 56GbE, 100GbE, 200GbE and 400GbE cables, including Direct Attach Copper cables (DACs), copper splitter cables, Active Optical Cables (AOCs) and transceivers in a wide range of lengths from 0.5m to 10km. In addition to meeting Ethernet standards, NVIDIA tests every product in an end-to-end environment ensuring a Bit Error Rate of less than 1E-15Read more at LinkX Cables and Transceivers.

Document Conventions

When discussing memory sizes, MB and MBytes are used in this document to mean size in mega Bytes. The use of Mb or Mbits (small b) indicates size in mega bits. In this document PCIe is used to mean PCI Express.

Revision History

A list of the changes made to this document are provided in Document Revision History.