BIOS Configuration
Advanced Chipset Features
51
Active to Precharge Delay : This item enables you to set the
number of DRAM clocks for TRAS. TRAS indicates the time
required for the memory to restore data and come to a full charge.
The default setting is “8”.
DRAM RAS# to CAS# Delay : Enables you to select the RAS to
CAS delay time in HCLKs of 2/2 or 3/3. The value is set at the
factory depending on the DRAM installed. Do not change the values
in this field unless you have changed the specifications of the
installed DRAM or the installed CPU. The default setting is “4”.
DRAM RAS# Precharge : DRAM must continually be refreshed or
it will lose its data. Normally, DRAM is refreshed entirely as the
result 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
insufficient time is allowed, refresh may be incomplete and data lost.
The default setting is “4”.
Memory Frequency For : Enables you to set the memory frequency
for the installed memory. Select “Auto” (default) to enable the
system to set the memory frequency automatically according to the
installed DRAM. The other options are “PC100”, or “PC133”.
System/ Video BIOS Cacheable : When set to “Enabled”, the
System and Video BIOS will be cached for faster execution. The
default setting is “Enabled”.
Memory Hole At 15M-16M : If Set to “Enabled”, when the system
memory size is equal to or greater than 16M bytes, the physical
memory address from 15M to 16M will be passed to PCI or ISA and
there will be a 1 MB hole in your system memory. This option is
designed for some OS with special add-in cards which need 15-16
MB memory space. The default setting is “Disabled”.
