Lanner HCP-72i1 User Manual page 64

Intel (R) I/OAT:This option is enabled by Intel's virtualization technology. Press "Enter" to access the sub-menu.
This is the Intel I/O Acceleration Technology option. Enable it to accelerate system performance in virtualization
operation. However, for considerations regarding possible data loss under Linux operating systems, this is "Disabled"
by default.
IOH Resource Selection: you may select "Auto" or "Manual" for your I/O hub (IOH) resource allocation. If you select
"Auto", PCI resource allocation across multiple IOHs is optimized automatically based on the PCI devices present.
Therefore, the default is set as "Auto" instead of "Manual".
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