Lanner electronic FW-7650 - Manual (Page 36)

3.5 Chipset Features Setup
DRAM Clock : The chipset support synchronous and asynchronous mode between
the host clock and DIMM clock.
Host CLK (default) DIMM clock equal to host clock
66MHz DIMM clock equal to 66MHz
SDRAM Cycle Length : This item allows you to select the SDRAM cycle length. The
settings are 2 or 3.
CAS latency Time: When synchronous DRAM is installed, the number of clock
cycles of CAS latency depends on the DRAM timing. Do not reset this field from the
default value specified by the system designer.
DRAM RAS# to CAS# Delay: This field lets you insert a timing delay