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According to https://ark.intel.com/products/31894/Intel-82801IR-IO-Controller is currently a Retired and discontinued product. Support is provided by the Intel® Communities users on the Intel® website.
Could you please provide us with the specific version of RSTe you have currently installed and which was the version you had previously installed?
Here is a link to the available downloads for this board:
If you have any more questions, please let me know.
Intel always recommends using validated hardware/software configuration to avoid unforeseen issues.
We would like to know if there is anything else we could be of assistance.
If you have any more questions, please let us know.