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ASUS K7V User’s Manual66
4. BIOS SETUP
4. BIOS SETUP
Chip Configuration
SDRAM CAS Latency
This controls the latency between the SDRAM read command and the time
that the data actually becomes available. NOTE: This field will only be dis-
played when SDRAM Configuration is set to [User Define].
SDRAM RAS Precharge Time
This controls the idle clocks after issuing a precharge command to the
SDRAM. NOTE: This field will only be displayed when SDRAM Con-
figuration is set to [User Define].
SDRAM RAS to CAS Delay
This controls the latency between the SDRAM active command and the
read/write command. NOTE: This field will only be displayed when
SDRAM Configuration is set to [User Define].
Delayed Transaction [Enabled]
Enabled, this frees the PCI Bus when the CPU is accessing 8-bit ISA cards
that normally consume about 50-60 PCI Clocks without PCI delayed trans-
action. Select [Disabled] for ISA cards that are not PCI 2.1 compliant. Con-
figuration options: [Enabled] [Disabled]
PCI to DRAM Prefetch [Enabled]
Configuration options: [Disabled] [Enabled]
Byte Merge [Disabled]
To optimize the data transfer on PCI, this merges a sequence of individual
memory writes (bytes or words) into a single 32-bit block of data. However,
byte merging may only be done when the bytes within a data phase are in a
prefetchable address range. Configuration options: [Disabled] [Enabled]
DRAM Read Latch Delay [0.5 ns]
Configuration options: [0.0 ns] [0.5 ns] [1.0 ns] [2.0 ns]
DRAM Interleave Setting [Auto]
Configuration options: [Auto] [Disabled]
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]
Video Memory Cache Mode [UC]
USWC (uncacheable, speculative write combining) is a new cache technol-
ogy for the video memory of the processor. It can greatly improve the dis-
play speed by caching the display data. You must set this to UC (uncacheable)
if your display card cannot support this feature; otherwise your system may
not boot. Configuration options: [UC] [USWC]