Asus P4S8X-X User Manual page 51

SDRAM Command Lead-off Time [Auto]
When set to [2T], memory read/write commands are issued 1 clock cycle behind
the memory address (MA). When set to [1T], read/write commands and MA are
issued simultaneously. 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 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 4X card.
Configuration options: [1X Mode] [2X] [4X] (AGP 4X card installed)
[4X Mode] [8X] (AGP 8X card installed)
AGP Fast Write Capability [Enabled]
This field enables or disables the AGP 4x Fast Write Capability feature.
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]
PCI 2.1 Support [Enabled]
This field enables or disables the motherboard feature to support PCI 2.1 cards.
Configuration options: [Disabled] [Enabled]
Onboard PCI IDE [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]
IDE Bus Master Support [Enabled]
This item controls the IDE Bus Master support for non-Windows operating
systems. Configuration options: [Disabled] [Enabled]
ASUS P4S8X-X motherboard user guide 2-19