Asus Z9PE-D16-10G/DUAL - Manual (Page 88)

4-20 Chapter 4: BIOS setup
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]
4.4.4 PCH SATA Configuration
[AHCI Mode]