Asus P9D-I - Manual (Page 72)

4-20 Chapter 4: BIOS setup
PCIE Slot Configuration
Allows you to perform PCIE slot configurations.
PCIE Option Rom 1 [Enabled]
Allows you to enable or disable the PCIE slots. Configuration Options: [Disabled][Enabled]
Aptio Setup Utility - Copyright (C) 2013 American Megatrends, Inc.
Advanced
PCIE Slot Configuration
PCIE1
Not Present
PCIE1 Option Rom [Enabled]
Enabled/Disabled PCIE1
Option Rom