Asus P4S533-VM User Manual page 76

SDRAM Command Lead-off Time [Auto]
When set to [2T], memore 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: [2T]
[1T] [Auto]
Graphics Aperture Size [64MB]
This feature sets the size of mapped memory for AGP graphic data.
Configuration options: [4MB] [8MB] [16MB] [32MB] [64MB] [128MB]
[256MB]
Onboard VGA Shared Memory Size [32M]
This feature sets the size of shared memory for VGA graphic data.
Configuration options: [4MB] [8MB] [16MB] [32MB] [64MB]
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]
60 Chapter 4: BIOS Setup