Thank you for posting on the Intel® communities.
The operating system should be installed on RAID or AHCI, not in the RST premium.
For better guidance, you might contact the system manufacturer so they can guide you through the BIOS options to install the operating system.
A Contingent Worker at Intel
Thanks for your reply. But i fixed it, i updated the latest firmware and i was successful installing the OS and Optane Memory. My pc is working like a charm, Optane memory is doing its job.