Asus P4S133 User Manual page 78

SDRAM RAS Active Time [5T]
This item controls the number of SDRAM clocks used for SDRAM parameters.
SDRAM Command Lead-off Time [Auto]
Configuration options: [Auto] [2T] [1T]
Graphics Aperture Size [64MB]
This feature allows you to select the size of mapped memory for AGP
graphic data. Configuration options: [4MB] [8MB] [16MB] [32MB] [64MB]
[128MB] [256MB]
AGP Capability [4X Mode]
This motherboard supports the AGP 4X interface that transfers video data
at 1066MB/s. AGP 4X is backward-compatible, so you may keep the
default [4X Mode] even if you are using an AGP 1X or 2X video card.
When set to [1X Mode], the AGP interface only provides a peak data
throughput of 266MB/s even if you are using an AGP 2X/4X card. When
set to [2X Mode], the AGP interface provides a peak data trhoughput of
only 533MB/s even if you are using an AGP 4X card.
Configuration options: [1X Mode] [2X Mode] [4X Mode]
AGP Fast Write Capability [Disabled]
Configuration options: [Disabled] [Enabled]
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]
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]
PCI 2.1 Support [Enabled]
This field allows you to enable or disable the PCI 2.1 features. Keep the
default setting [Enabled] if you installed PCI 2.1 compliant cards. Set to
[Disabled] if you installed any card that is not PCI 2.1 compliant.
Configuration options: [Disabled] [Enabled]
62 Chapter 4: BIOS Setup