Maybe try to read point 4 of this: [HowTo] Get full NVMe support for all Systems with an AMI UEFI BIOS
Problem is also happened here: [OFFER] Asus P8B75-M BIOS v1701 NVMe, EFI_ROM microcode update
Maybe try to read point 4 of this: [HowTo] Get full NVMe support for all Systems with an AMI UEFI BIOS
Problem is also happened here: [OFFER] Asus P8B75-M BIOS v1701 NVMe, EFI_ROM microcode update