This message was posted on behalf of Intel Corporation
Thank you for contacting our support community. We understand your situation regarding the Intel® Optane™ Memory.
Based on the information provided, it seems that your Optane™ is concatenated and keeping the old files regarding the previous Windows* installation. In order for you to be able to detect the module, we recommend you to follow the next steps:
1-Make sure that the SATA controller mode is back to Intel(R) RST Premium with Intel Optane System Acceleration.
2-Once you change the SATA Controller Mode, please go to Devices\Add-in Confing\Intel(R) Rapid Storage Technology and select the configure option.
3-Please Select the Optane™ and you should see an option that says something like "Reset to non Optane™", click on the option and it should delete the old information.
4-Reboot the system and try to enable the module again.
Please let us know the outcome of your situation.