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BIOS Setup
select the best option in the “CAS Latency Time”
to “System Memory Frequency” fields.
CAS Latency Time
This field is used to select the latency between the DRAM read
command and the time that the data was received.
DRAM RAS# to CAS# Delay
This field is used to select the latency between the DRAM active
command and the read/write command.
DRAM RAS# Precharge
This field is used to select the idle clocks after issuing a precharge
command to the DRAM.
Precharge Delay (tRAS)
The options are Auto, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15.
System Memory Frequency
This field is used to select the memory clock speed of the DIMM.
SLP_S4# Assertion Width
The options are 1 to 2 Sec., 2 to 3 Sec., 3 to 4 Sec. and 4 to 5 Sec.
Refresh Mode Select
The options are Auto, 15.6us, 7.8us, 64us, RVMYTI0, RVMYTI1,
RVMYTI2, RVMYTI3 and RVMYTI4. RVMYTI refers to Reserved
Value May You Try It.
Refresh Cycle Time
Refresh cycle time is the time measured on a given role from REF
command to the following ACT at the same row. It is tracked
separately from tRC to DDR SDRAM. For DDR33, normally, 72ns
(256Mb-512Mb) is set at 12 clock while 120ns (1Gb) is set at 20
clock.