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About This Manual

This User Manual describes NVIDIA® ConnectX®-5 and ConnectX®-5 Ex Ethernet Single and Dual SFP28 and QSFP28 port PCI Express x8/x16 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-5 Ethernet adapter cards.

IC in UseOPNMarketing Description
ConnectX®-5 ExMCX512A-ADATConnectX®-5 Ex EN network interface card, 25GbE dual-port SFP28, PCIe Gen 3.0/4.0 x8, tall bracket
MCX516A-BDATConnectX®-5 Ex EN network interface card, 40GbE dual-port QSFP28, PCIe Gen 4.0 x16, tall bracket
MCX516A-CDATConnectX®-5 Ex EN network interface card, 100GbE dual-port QSFP28, PCIe Gen 4.0 x16, tall bracket
ConnectX®-5MCX512A-ACATConnectX®-5 EN network interface card, 25GbE dual-port SFP28, PCIe Gen 3.0 x8, tall bracket
MCX512A-ACUT  ConnectX®-5 EN network interface card, 10/25GbE dual-port SFP28, PCIe Gen 3.0 x8, UEFI Enabled (x86/Arm), tall bracket
MCX512F-ACATConnectX®-5 EN network interface card, 25GbE dual-port SFP28, PCIe Gen 3.0 x16, tall bracket
MCX512F-ACHTConnectX®-5 EN network interface card, with host management, 25GbE Dual-port SFP28, PCIe Gen 3.0 x16, UEFI Enabled, tall bracket
MCX515A-GCATConnectX®-5 EN network interface card, 50GbE single-port QSFP28, PCIe Gen 3.0 x16, tall bracket
MCX516A-GCATConnectX®-5 EN network interface card, 50GbE dual-port QSFP28, PCIe Gen 3.0 x16, tall bracket
MCX515A-CCATConnectX®-5 EN network interface card, 100GbE single-port QSFP28, PCIe Gen 3.0 x16, tall bracket
MCX515A-CCUTConnectX®-5 EN network interface card, 100GbE single-port QSFP28, PCIe Gen 3.0 x16, UEFI Enabled (Arm, x86), tall bracket
MCX516A-CCHTConnectX®-5 EN network interface card, with host management 100GbE dual-port QSFP28, PCIe Gen 3.0 x16, UEFI Enabled,  tall bracket
MCX516A-CCATConnectX®-5 EN network interface card, 100GbE dual-port QSFP28, PCIe Gen 3.0 x16, tall 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 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 OFED for Linux User Manual and Release NotesUser Manual describing OFED features, performance, band diagnostic, tools content and configuration. See NVIDIA 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 http://www.nvidia.com Products > Software > Ethernet Drivers > VMware Driver
NVIDIA Firmware Utility (mlxup) User Manual and Release NotesNVIDIA firmware update and query utility used to update the firmware. See http://www.nvidia.com > Products > Software > Firmware Tools >mlxup Firmware Utility
NVIDIA Firmware Tools (MFT) User Manual

User Manual describing the set of MFT firmware management tools for a single node. See MFT User Manual.

IEEE Std 802.3 SpecificationIEEE Ethernet specification at http://standards.ieee.org/
PCI Express SpecificationsIndustry Standard PCI Express Base and Card Electromechanical Specifications at https://pcisig.com/specifications
NVIDIA LinkX Interconnect Solutions

NVIDIA LinkX 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 portfolios of 40Gb/s, 56Gb/s and 100Gb/s 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-15. Read more at LinkX® Ethernet Cables and Transceivers.


Document Conventions

When discussing memory sizes, MB and MBytes are used in this document to mean size in MegaBytes. The use of Mb or Mbits (small b) indicates size in MegaBits. 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.