3.4.2 North Bridge Configuration

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].

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ASRock P75 Pro3 manual North Bridge Configuration, Primary Graphics Adapter, VT-d, PCIE1 Link Speed