ASROCK P75 Pro3 - North Bridge Configuration

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3.4.2 North Bridge Conguration
Primary Graphics Adapter
This allows you to select [PCI] or [PCI Express] as the boot graphic adapt-
er priority. The default value is [PCI Express].
VT-d
Use this item to enable/disable Intel(R) Virtualization Technology for
Directed I/O.
PCIE1 Link Speed
This allows you to select PCIE1 Link Speed. The default value is [Auto].