Shuttle FB81 Manual page 78

DRAM RAS# to CAS# Delay
This field lets you insert a timing delay between the CAS and RAS
strobe signals, and you can use it when DRAM is written to, read from,
or refreshed. Faster performance is gained in high speed, more stable
performance, in low speed. This field is applied only when synchro-
nous DRAM is installed in the system.
Ø The choice: Auto, 5, 4, 3 or 2.
DRAM RAS# Precharge
If an insufficient number of cycles is allowed for the RAS to accumulate
its charge before DRAM refresh, the refresh may be-incompleted, and
the DRAM may fail to retain data. Fast gives faster performance; and
Slow gives more stable performance. This field is applied only when
synchronous DRAM is installed in the system.
Ø The choice: Auto, 5, 4, 3 or 2.
Precharge delay (tRAS)
This item allows you to select Precharge delay (tRAS).
Ø The choice: Auto or 4~15.
System Memory Frequency
This item allows you to select System Memory Frequency.
Ø The choice: Auto, 333MHz or 400MHz.
Refresh Mode Select
This item allows you to select Refresh Mode.
Ø The choice: Auto, 7.8us, 15.6us or 64us.
****** Clock ******
Now CPU Frequency
Now DDR Frequency
CPU Clock Ratio
This item allows the user to adjust CPU Clock Ratio.
If CPU is unlocked, item appear.
Ø The Choice: The Clock Ratio depend on CPU.
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