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ASUS P4S333 motherboard user guide
4-19
The DDR SDRAM RAS Precharge Time parameter appears only when
you set the SDRAM Configuration to [User Defined].
SDRAM RAS Precharge Time [3T]
This item controls the idle clocks after issuing a precharge command to
the DDR SDRAM.
SDRAM Mode [Normal]
This item allows you to select the SDRAM RAS to CAS Delay Time (T
RCD
)
and the SDRAM RAS Precharge Time (T
RP
) for 4T when the DRAM
frequency is greater than 166MHz. The setting [Safe] forces T
RCD
and T
RP
to equal to 4T. [Normal] is equal to the setting [By SPD] or as user defined.
Configuration options: [Normal] [Safe]
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] [512MB]
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]
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]