Mainboard User’s Manual
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Advanced Chipset Features
Onboard Display Cache Setting*
The items under this heading are used to set the parameters for dis-
play cache memory that may be optionally installed on your
mainboard. If you have display cache memory, we recommend that
you leave these items at the default settings.
CAS# Latency:
This item sets a timing parameter for the Column
Address Strobe memory access. Leave this item at the default setting
“Auto” so that the system auto-detects the correct timing.
Paging Mode Control:
This item allows you to enable and disable
page open mode. If set to “Enabled,” the GMCH memory controller
tends to leave the page open.
RAS-to-CAS Override:
This item sets the timing parameters for the
system memory such as the CAS (Column Address Strobe) and RAS
(Row Address Strobe). We recommend that you set RAS-to-CAS to
“byCAS# LT” (default) so that the memory timing is automatically
detected.
RAS# Timing:
Sets the Row Address Strobe (RAS) timing. Leave
this at the default setting “Fast.”
RAS# Precharge Timing:
DRAM must continually be refreshed or
it will lose its data. Normally, DRAM is refreshed entirely as the re-
sult of a single request. This option allows you to determine the
number of CPU clocks allocated for the Row Address Strobe (RAS)
to accumulate its charge before the DRAM is refreshed. If insuffi-
cient time is allowed, refresh may be incomplete and data lost.
Options are “2” and “3” (default).
