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CHAPTER 8 - BIOS Setup
SPI-8450-LLVA
87
Description Choice
Active to Precharge delay
Select the precharge delay timer.
DRAM RAS# to CAS# delay
This field lets you insert a timing delay
between the CAS and RAS strobe signals,
used when DRAM is written to, read from, or
refreshed. Fast gives faster performance; and
Slow gives more stable performance. This
field applies only when synchronous DRAM
is installed in the system.
DRAM RAS# Precharge
The precharge time is the number of cycles it
takes for the RAS to accumulate its charge
before DRAM refresh. If insufficient time is
allowed, refresh may be incomplete and the
DRAM may fail to retain data.
Turbo Mode
This allows you to determine the type of
timing the system uses when reading or
writing to DRAM. Selections are Fast, Fastest,
Normal (default) and Slow.
This field provides an alternative method of
selecting DRAM timing. Again, the selected
value must be set by the board designer,
according to specifications of the installed
DRAM and other board components. Turbo
mode reduces CAS access time by 1 clock
tick.
Memory Frequency for
Select the memory frequency for DDR200
when install the memory with specification of
DDR200, or when install the memory with
specification of DDR266, or Auto define by
the BIOS.