Asus A7V266-M - Manual (Page 76)

60 Chapter 4: BIOS Setup
Graphics Aperture Size [32MB]
This feature allows you to select the size of mapped memory for AGP
graphic data. Configuration options: [4MB] [8MB] [16MB] [32MB] [64MB]
[128MB] [256MB]
Video Memory Cache Mode [UC]
USWC (uncacheable, speculative write combining) is a new cache technology
for the video memory of the processor. It can greatly improve the display
speed by caching the display data. You must set this to UC (uncacheable) if
your display card does not support this feature, otherwise the system may
not boot. Configuration options: [UC] [USWC]
Onboard PCI IDE Controller [Both]
This field allows you to enable either the primary IDE channel or secondary
IDE channel, or both. You can also set both channels to [Disabled].
Configuration options: [Both] [Primary] [Secondary] [Disabled]
Memory Hole At 15M-16M [Disabled]
This field allows you to reserve an address space for ISA expansion cards.
Setting the address space to a particular setting makes that memory space
unavailable to other system components. Expansion cards can only access
memory up to 16MB. Configuration options: [Disabled] [Enabled]