You need to download the .bin or .exe file for the desired older version from the HPE Support Center.
– A notorious issue: certain iLO 4 updates cause fans in ProLiant DL380p Gen8 servers to run at 100% constantly, even with low CPU load. Downgrading to 2.55 or 2.62 often solves this.
– Legacy monitoring systems (like older PRTG or custom scripts) may fail with newer iLO APIs.
While downgrading iLO 4 firmware is possible, it is rarely "better" for modern environments unless you are troubleshooting a specific regression or compatibility issue Hewlett Packard Enterprise Community Reasons to Downgrade Interface Preference: downgrade ilo 4 firmware better
1. Taming Rocket-Engine Fan Speeds (The "Silence of the Fans" Issue)
Downgrading iLO 4 firmware is a common task for users looking to caused by newer updates or to restore compatibility with certain legacy management tools. This process is officially supported by HPE, though typically recommended only when necessary. Why Downgrade?
: The server assumes the card is melting. It turns the cooling fans up to 100% speed. You need to download the
Log into iLO web GUI → → Access Settings → Enable SSH and optionally Local User Account (if using AD, have a local backup admin).
While a downgrade can solve many problems, it's not without significant risk. If an error occurs during flashing, or you flash corrupted firmware, the iLO will not be able to recover itself. The iLO's flash chip cannot be programmed on-board and may require desoldering and reprogramming to recover functionality.
Before you change your firmware, you must weigh these major risks: Online ROM Flash Component for Windows x64 - HPE Support – Legacy monitoring systems (like older PRTG or
For many IT professionals, developers, and homelab enthusiasts running HPE ProLiant Gen8 servers, the mantra is usually "update to the latest firmware." However, with Integrated Lights-Out 4 (iLO 4), the latest version isn't always the greatest. In fact, many users find that a for maintaining stability, avoiding license issues, and ensuring compatibility with older hardware .
What are you trying to fix (high fans, NAND errors, or connection drops)? Which firmware version is currently installed? Share public link