Asus P7P55D PRO - Manual (Page 86)

3-24 Chapter 3: BIOS setup
Chapter 3
3.6.5 PCIPnP
The PCI PnP menu items allow you to change the advanced settings for PCI/PnP devices.
Plug And Play O/S [No]
[Yes] When set to [Yes] and if you install a Plug and Play operating system, the
operating system configures the Plug and Play devices not required for
boot.
[No] When set to [No], BIOS configures all the devices in the system.
3.6.6 Intel VT-d [Disabled]
[Disabled] Disables the Intel Virtualization Technology for Directed I/O.
[Enabled] Enables the Intel Virtualization Technology for Directed I/O.
3.6.7 T.Probe [Enabled]
[Disabled] Disables the T.Probe function.
[Enabled] Enables the T.Probe function..
Advanced PCI/PnP Settings
WARNING: Setting wrong values in below sections
may cause system to malfunction.
Plug And Play O/S [No]
BIOS SETUP UTILITY
Advanced