Firmware for the Nvidia HGX B300 NVL8 Air-Cooled Baseboard Assembly - Non-Rollback Protected

Restart required Installed This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.
Firmware versions
===================
Version 20.26.03.25 - FW 1.4.30

ERoT 01.04.0046.0000_n04
FPGA 1.54
HMC B3-2511-04.0
GPU VBIOS 97.10.64.00.0C
SMA GPU 0004.00.0272.0000
ConnectX-7 NVSwitch Bridge 28.47.2526
NVSwitch 35_2014_4770
ConnectX-8 PCIe Switch 40.47.2526
SMA ConnectX-8 0011.00.0272.0002
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Fixes & Enhancements

New Feature Summary
===================
- None

Fixes in FW 1.4.30
===================
- Fixed the issue where NVLink Task Scheduling behavior was leading to GPU driver hangs
- Fixed the issue where Embedded ConnectX-8 devices do not stably enumerate on MCTP
- Other minor bug fixes and enhancements

Fixes included from FW 1.4.00
=============================
- Fixed the issue where multiple CX-8 failed to initialize after a warm reboot
- Fixed the issue where pcie downstream device detection failed
- Fixed the issue of NCCL performance was reduced due to incorrect power profile of NVSwitch

Known Issues
===================
- GPU assembly firmware activation after updating needs to be done through a physical AC cycle or through a Redfish initiated Virtual AC Cycle
- ConnectX-8 firmware update as part of the GPU assembly firmware update might fail. Power cycle and apply the firmware update.
Read More

Version

20.26.03.25, A00

Release date

14 Apr 2026

Download Type

Firmware

Category

Accelerators

Importance

Urgent
Dell Technologies highly recommends applying this important update as soon as possible. The update contains critical bug fixes and changes to improve functionality, reliability, and stability of your Dell system. It may also include security fixes and other feature enhancements.
Available formats View Important Information
File Format: Update Package for MS Windows 64-Bit.
File Name: Accelerators_Firmware_XRG43_WN64_20.26.03.25_A00.EXE
File Size: 102.07 MB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
Dell Update Packages in native Microsoft Windows 64-bit format do not require that Microsoft WOW64 be installed on the Microsoft Windows Server.
To ensure the integrity of your download, please verify the checksum value.
MD5:
6eb3a11c718b35c77479c73d917f00b9
SHA1:
f645dcca6b9ba7b59c9f0e71e51f6d033d128977
SHA-256:
b40c9ec68bc8c8f3fc2fe015142088a2ad6ab4cde6fd2b26e83d8a28300ea5be
File Format: External release notes
File Name: Release-notes.txt
File Size: 4.79 KB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file format contains plain text which can be viewed with a standard text editor.
To ensure the integrity of your download, please verify the checksum value.
MD5:
d1ea0223b02447169392e85a156f8d93
SHA1:
4b7fabf73291b2d589edb9f6fe8d1586339d7d70
SHA-256:
d9dcbd895d845a75be79e2d555ecb04f1d9acaa3bb3590d758491bb57be10f0f

By downloading, you accept the terms of the Dell Software License Agreement.

Additional details

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Important Information
===================
- IMPORTANT: The system must be Powered ON for the firmware update to be applied.
- An AC REBOOT or Redfish initiated Virtual AC Power Cycle is required after completion for the firmware changes to take effect.
- Please review the Virtual AC options in the installation instructions
- Power Smoothing feature is not implemented or supported
NVIDIA HGX B300 270GB SXM6 GPU Air-Cooled
Installation Instructions
=========================
Installation via iDRAC.
1. Download the file to a system with access to the IDRAC of the server you wish to update.
2. Log into the iDRAC of the server you wish to update.
3. Navigate to the System Update menu.
4. Click the Browse button and navigate to the downloaded file and select.
5. Click the check box next to the package at the bottom of the IDRAC menu.
6. Click the Update button in the iDRAC menu.
7. Wait for the created Job to finish.
8. AC Reboot or Virtual AC Power Cycle the system.

Physical AC Cycle requires that all AC power is removed from the server node
https://www.dell.com/support/kbdoc/en-us/000175625/how-do-i-reset-and-drain-power-of-my-dell-poweredge-server


Initiating Virtual AC cycle from a remote host
==============================================
Step 1: Initiate a graceful shutdown. It can be implemented by the following Redfish curl command
curl -k -u ${username}:${pwd} -X POST https://${IDRAC_IP}/redfish/v1/Systems/System.Embedded.1/Actions/ComputerSystem.Reset -H "Content-Type: application/json" -d '{"ResetType":"GracefulShutdown"}'

example: curl -k -u root:calvin -X POST https://10.0.0.10/redfish/v1/Systems/System.Embedded.1/Actions/ComputerSystem.Reset -H "Content-Type: application/json" -d '{"ResetType":"GracefulShutdown"}'


Step 2: Initiate a virtual power cycle execution by the following Redfish curl command

curl -k -u ${username}:${pwd} -X POST https://${IDRAC_IP}/redfish/v1/Chassis/System.Embedded.1/Actions/Chassis.Reset -H "Content-Type: application/json" -d '{"ResetType": "PowerCycle", "FinalPowerState": "On"}'

example: curl -k -u root:calvin -X POST https://10.0.0.10/redfish/v1/Chassis/System.Embedded.1/Actions/Chassis.Reset -H "Content-Type: application/json" -d '{"ResetType": "PowerCycle", "FinalPowerState": "On"}'

Single Redfish command implementation:

curl -k -u ${username}:${pwd} -X POST https://${IDRAC_IP}/redfish/v1/Chassis/System.Embedded.1/Actions/Chassis.Reset -H "Content-Type: application/json" -d '{"ResetType":"FullPowerCycle"}'

example: curl -k -u root:calvin -X POST https://10.0.0.10/redfish/v1/Chassis/System.Embedded.1/Actions/Chassis.Reset -H "Content-Type: application/json" -d '{"ResetType":"FullPowerCycle"}'


Note: Invoking a Virtual AC cycle through BIOS Full Power Cycle may not activate all GPU assembly firmware components.

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