Read the 2 following posts:
Enabling XMP on a Lenovo ThinkCentre E73, possible? - BIOS/UEFI Modding / BIOS Modding Guides and Problems - Win-Raid Forum (level1techs.com)
[Request] NVMe Support for Lenovo ThinkCentre M73 - BIOS/UEFI Modding / BIOS Modding Requests - Win-Raid Forum (level1techs.com)