ETOP PI-P5BVLL, Руководство пользователя

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PI-P5BVLL User`s Manual 49
DRAM Timing Selectable
The choice: Manual, By SPD (default) .
If DRAM Timing Selectable is [Manual], can choice these Items:
► CAS Latency Time.
► Dram RAS# to CAS# Delay.
►
DRAM RAS# Precharge.
► Precharge dealy (tRAS).
► System Memory Frequency.
CAS Latency Time
This controls the latency between DDR RAM read command and the
time that the data actually becomes available.
Leave this on the default setting.
The choice: 5, 4, 3, 6, Auto
(default) .
DRAM RAS# to CAS# Delay
In order to improve performance, certain space in memory is
reserved for PISA cards.
This memory must be mapped into the memory space below 16MB.
The choice: 2, 3, 4, 5, 6, Auto
(default) .
DRAM RAS# Precharge
This controls the idle clocks after issuing a precharge command to
DRAM.
Leave this on the default setting.
The choice: Auto
(default) , 2, 3,4,5,6.
Precharge dealy (tRAS)
The choice: Auto (default) , 4,5,6,7,8,9,10,11,12,13,14,15.
System Memory Frequency
The choice: Auto (default) , 533MHz, 667MHz.
System BIOS Cacheable
The choice: Enabled (default) , Disabled.