I need Bios modding for an Asus P8B75M- LE to reed a disk NMVE in a PCIe adapter

I need Bios modding for an Asus P8B75M- LE to reed a disk NMVE in a PCIe adapter. I just update with the last bios version from site Asus, but it is old and it has not support to NVMe disk with a pcie adapter. I need your help please.
Thanks.