Abit SG-71 User Manual page 62

Chapter 4
4-12
Memory Hole at 15M-16M:
Two options are available: Disabled Enabled. The default setting is Disabled. This option is used to
free up the memory block 15M-16M. Some special peripherals need to use a memory block located
between 15M and 16M. We recommend that you disable this option.
AGP Aperture Size:
Seven options are available: 4MB 8MB 16MB 32MB 64MB 128MB 256MB Back
to 4MB. The default setting is 128MB. 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.
Graphic Window WR Combin:
Two options are available: Disabled Enabled. The default setting is Enabled. When you set to Enabled,
it will use CPU write combine function to enhance 3D graphic performance.
AGP Data Transfer Rate:
Three options are available: Auto 2X 4X. The default setting is Auto. If you use the older AGP
adapter that does not support AGP 4X mode, you have to set it to 2X mode. If you set this item to Auto,
BIOS will automatically set the AGP operation mode that depends which AGP mode of AGP adapter you
installed.
SG-71