Customer Affecting Changes | ConnectX-9 Firmware RN

Changes in This Release

This section provides a list of changes that took place in the current version and break compatibility/interface, discontinue support for features and/or OS versions, etc.

Introduced in Version	Description
82.48.1000	Transition to 2023 Microsoft UEFI Certificate Authority: To align with updated Microsoft UEFI Secure Boot requirements and the upcoming end-of-life of the 2011 Certificate Authority (CA), NVIDIA is transitioning to the 2023 CA. To ensure successful loading of the Expansion ROM (ExpROM) during the UEFI Secure Boot process, system BIOS and operating system trust stores must be updated to include the 2023 CA. Note: When performing a firmware update of ConnectX and BlueField devices the new certificate is required for Secure Boot. To continue supporting Secure Boot, systems must be updated to recognize the "Microsoft Option ROM UEFI CA 2023."
When using an optics module, you must configure the desired port link width on the ConnectX side via NVConfig (split configuration). For best results, set the link width using the non-volatile mlxconfig command, for example: `mlxconfig -d <device> set MODULE_SPLIT_M0=<value>` For more details, run: `mlxconfig --help` and refer to the Port Split section in the User Manual.

Introduced in Version

Description

82.48.1000

Transition to 2023 Microsoft UEFI Certificate Authority:

To align with updated Microsoft UEFI Secure Boot requirements and the upcoming end-of-life of the 2011 Certificate Authority (CA), NVIDIA is transitioning to the 2023 CA. To ensure successful loading of the Expansion ROM (ExpROM) during the UEFI Secure Boot process, system BIOS and operating system trust stores must be updated to include the 2023 CA.

Note: When performing a firmware update of ConnectX and BlueField devices the new certificate is required for Secure Boot. To continue supporting Secure Boot, systems must be updated to recognize the "Microsoft Option ROM UEFI CA 2023."

When using an optics module, you must configure the desired port link width on the ConnectX side via NVConfig (split configuration). For best results, set the link width using the non-volatile mlxconfig command, for example:

mlxconfig -d <device> set MODULE_SPLIT_M0=<value>

For more details, run:

mlxconfig --help

and refer to the Port Split section in the User Manual.

Changes Planned for Future Releases

This section provides a list of changes that will take place in a future version of the product and will break compatibility/interface, discontinue support for features and/or OS versions, etc.

Planned for Version	Description
N/A	N/A

Changes in Earlier Releases

This section provides a list of changes that took place throughout the past two major releases that broke compatibility/interface, discontinued support for features and/or OS versions, etc.

For an archive of all changes, please refer to the Release Notes History section.

Introduced in Version	Description
N/A	N/A

Discontinued Features

List of features which are supported in previous generations of hardware devices.

InfiniBand: FDR and lower speeds

For inquiries regarding mitigation, please contact NVIDIA Support.

Last updated: February 23, 2026