Mellanox ConnectX 3 Ethernet Adapter Driver

The Mellanox ConnectX 3 Ethernet Adapter driver allows Windows to recognize the network adapter and use it for Ethernet connectivity. Installing a compatible Mellanox driver can help resolve missing-adapter errors and provide access to supported network settings.

Key Features

• Adapter recognition: Provides the software interface Windows needs to detect and operate supported ConnectX 3 Ethernet hardware.
• Network configuration: Enables supported adapter settings, which may include link-speed selection, jumbo frames, and other Ethernet options.
• Traffic-processing support: Allows compatible hardware and driver combinations to use features such as checksum offloading and receive-side scaling, helping distribute network processing efficiently.
• Connection troubleshooting: Makes adapter status and driver information available through Windows management tools, helping you investigate connectivity problems.

How to Install

1. Identify your adapter and Windows version. Open Device Manager and look under Network adapters. If the device appears as an unknown Ethernet controller, check its hardware IDs under Properties > Details. Confirm your Windows edition and system architecture before choosing a package.

1. Check package compatibility. Select a Mellanox driver that explicitly lists your ConnectX 3 model and operating system. For Windows 11, Windows 10, Windows 8, or Windows 7, verify the package’s supported-OS list rather than assuming one download covers every version. Older adapter packages may not officially support newer Windows releases.

1. Prepare for a temporary disconnection. Save the installer locally and close applications that depend on the network. If you are updating the adapter used for a remote connection, arrange local access or an alternative connection first.

1. Install the driver. Extract the download if necessary, then run the included setup program with administrator permissions. If the package contains driver files without an installer, open Device Manager, right-click the adapter, choose Update driver, and browse to the extracted folder.

1. Restart and verify connectivity. Restart Windows if prompted, then confirm that the Mellanox ConnectX 3 Ethernet Adapter appears without a warning icon in Device Manager. Check the Ethernet connection and review any custom network settings after installation.

If installation fails, recheck the hardware ID, Windows compatibility, and any firmware requirements documented with the driver package. Avoid forcing an incompatible driver onto the adapter.