Abit VA-20 User Manual page 40

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AGP & P2P Bridge Control
Scroll to this item and press <Enter> to view the following screen:
AGP Aperture Size
This setting controls just how much system RAM can be allocated to AGP for video
purposes. The aperture is a portion of the PCI memory address range dedicated to
graphics memory address space. Host cycles that hit the aperture range are forwarded
to the AGP without any translation.
AGP Mode (4X)
Set this option to enable if you want the AGP bus to make use of the AGP 4X transfer
protocol to boost the AGP bus bandwidth. If it is set to disabled, then the AGP bus is
only allowed to use the AGP 1X or AGP 2X transfer protocol.
AGP Driving Control (Auto)
This item is used to signal driving current on AGP cards to auto or manual. Some
AGP cards need stronger than normal driving current in order to operate. We
recommend that you set this item to the default.
AGP Driving Value:
When AGP Driving Control is set to Manual, use this item to set the AGP current
driving value.
VA-20
Chapter 3