3.4.2 North Bridge Configuration

Primary Graphics Adapter

This item will switch the PCI Bus scanning order while searching for video card. It allows you to select the type of Primary VGA in case of multiple video controllers. The default value of this feature is [PCI Express]. Con- figuration options: [Onboard], [PCI] and [PCI Express].

Share Memory

This allows you to set the share memory feature. The default value is [Auto]. Configuration options: [Auto], [32MB], [64MB], [128MB], [256MB] and [512MB].

Onboard HDMI HD Audio

This allows you to enable or disable the “Onboard HDMI HD Audio” fea- ture.

Dual Graphics

This item appears only when you install AMD RADEON HD6670 / 6570

/6450 graphics card on this motherboard. Use this to enable or disable Dual Graphics feature. If you enable this option, the primary monitor will be onboard VGA. If you select [Auto], Dual Graphics function will be auto- matically enabled when you install AMD RADEON HD6670 / 6570 / 6450 graphics card. The default value is [Auto].

DVI Function

Use this to select DVI function when you install the DVI to HDMI adapter to DVI port. Configuration options: [as Dual Link DVI] and [as HDMI]. If you select [as Dual Link DVI], you can use Dual Link DVI monitor without au- dio function. If you select [as HDMI], you can use HDMI monitor with audio function. The default value is [as Dual Link DVI].

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ASRock A75 Pro4-M manual North Bridge Configuration