Asus P4B533-VM User Manual page 80

SDRAM RAS Precharge Delay [3T]
This item controls the idle clocks after issuing a precharge command to
the DDR SDRAM.
SDRAM Active Precharge Delay [5T]
This item controls the number of DDR SDRAM clocks used for DDR
SDRAM parameters.
SDRAM Idle Timer [Infinite]
Configuration options: [Infinite] [0T] [8T] [16T] [64T]
Onboard VGA [Disabled]
This field allows you to enable or disable the onboard VGA feature. Set to
[Enabled] if you wish to use the onboard VGA. Set to [Disabled] if you
installed an AGP device. If you did not install an external AGP device into
the AGP slot, BIOS will enable the onboard VGA regardless of the setting
of this field. Configuration options: [Disabled] [Enabled]
Graphics Aperture Size [128MB]
This feature allows you to select the size of mapped memory for AGP
graphic data. Configuration options: [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] [4X 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]
4-20 Chapter 4: BIOS Setup