Asus Z9PR-D12 - Manual (Page 82)

4-20 Chapter 4: BIOS setup
Enables or Disables BIOS ACPI
Auto Configuration.
Intel(R) VT-d [Disabled]
Intel(R) VT-d [Disabled]
Allows you to enable or disable Intel VT-d.
Configuration options: [Enabled] [Disabled]
Intel(R) VT for Directed I/O Configuration
The following item appears only when you set Intel(R) VT-d to [Enabled].
Coherency Support [Disabled]
Allows you to enable/disable VT-d Engine Coherency support.
Configuration options: [Disabled] [Enabled]
ATS Support [Disabled]
Allows you to enable/disable VT-d Engine address translation services (ATS)
support. Configuration options: [Disabled] [Enabled]
Aptio Setup Utility - Copyright (C) 2011 American Megatrends, Inc.
Advanced
High Precision Event Timer Configuration
High Precision Timer [Enabled]
Allows you to enable/disable High Precision Event Timer.
Configuration options: [Disabled] [Enabled]]