Abit KR7A, User Manual

Page: 45 / 104

Introducing the BIOS
User’s Manual
3-17
AGP & P2P Bridge Control:
This item can let you sets several items concerning the AGP parameters. If you do not understand what
each item doing, please keep the default settings as well. Wrong settings will cause system unstablity or
even prevent boot up!
Figure 3-5C. AGP & P2P Bridge Control Screen
AGP Aperture Size:
Seven options are available: 256M
)
128M
)
64M
)
32M
)
16M
)
8M
)
4M
)
Back to 256M.
The default setting is 64M . This option specifies the amount of system memory that can be used by the
AGP device. The aperture is a portion of the PCI memory address range dedicated for graphics memory
address space. Host cycles that hit the aperture range are forwarded to the AGP without any translation.
See www.agpforum.org for AGP information.
AGP Mode:
Three options are available: 4X
)
2X
)
1X. The default setting is 2X . If you use the older AGP adapter
that does not support AGP 4X or 2X mode, you need to set this item to 1X .
AGP Driving Control:
Two options are available: Auto or Manual. The default setting is Auto . Choosing Manual to key in an
AGP Driving Value is described within the next section. It is recommended this field be set to Auto in
order to avoid any errors in your system.
"
AGP Driving Value:
This item allows you to adjust the AGP driving force. You can key in the HEX number into this
section. The minimum number is 0000, and maximum number is 00FF.