ADLINK cPCI-3971 - Manual (Page 134)

120 BIOS Setup Utility
8.4 Chipset Configuration
Select the Chipset tab from the setup screen to enter the Chipset
BIOS Setup screen. You can select any of Chipset BIOS Setup
options by highlighting it using the < Arrow > keys. The Chipset
BIOS Setup screen is shown below.
System Agent (SA) Configuratio
Enables/disables Intel® Virtualization Technology for Directed I/O
(VT-d).