Asus P4G8X User Manual page 86

SDRAM Active Precharge Delay
(value depends on SDRAM SPD)
This item controls the number of DDR SDRAM clocks used for DDR
SDRAM parameters. Configuration options: [7T] [6T] [5T]
SDRAM Idle Timer [16T]
Configuration options: [Infinite] [16T]
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 [8X Mode]
This motherboard supports the AGP 8X interface that transfers video data
at 2.1GB/s. AGP 8X is backward-compatible, so you may keep the default
[8X Mode] even if you are using a slower AGP card.
Configuration options if an AGP 8X card is installed: [8X Mode] [4X Mode]
Configuration options without an AGP 8X card: [4X Mode] [1X Mode]
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]
Delay Transaction [Enabled]
When set to [Enabled], this feature frees the PCI bus when the CPU is
accessing 8-bit ISA cards. This process normally consumes about 50-60
PCI clocks without PCI delayed transaction. Set this field to [Disabled]
when using ISA cards that are not PCI 2.1 compliant. 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]
USB 2.0 HS Reference Voltage [Medium]
This item controls the USB 2.0 high-speed drive strength reference
voltage. Configuration options: [Low] [Medium] [High] [Maximum]
4-22 Chapter 4: BIOS Setup