ASROCK 775i65G User Manual page 27

Graphics Aperture Size
It refers to a section of the PCI memory address range used for graphics
memory. It is recommended to leave this field at the default value unless the
installed AGP card's specifications requires other sizes.
OnBoard LAN
This allows you to enable or disable the "OnBoard LAN" feature.
OnBoard AC'97 Audio
Select [Auto], [Enabled] or [Disabled] for the onboard AC'97 Audio feature.
OnBoard MC'97 Modem
Select [Auto] or [Disabled] for the onboard MC'97 Modem feature.
ICH Thermal Throttling
You may select [Auto] or [Disabled] to adjust ICH southbridge internal thermal
control mechanism to keep ICH southbridge from overheated.
VCCM +2.7V Voltage
This option allows you to set VCCM +2.7V Voltage. The default value is
[Auto]. Configuration options: [High], [Low], and [Auto].
VDDQ +1.58V Voltage
This option allows you to set VDDQ +1.58V Voltage. The default value is
[Auto]. Configuration options: [High], [Low], and [Auto].
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