3
BIOS Setup 
select the best option in the “CAS Latency Time” to “System Memory Frequency” fields.
3.1.3.2 CAS Latency Time
This field is used to select the latency between the DRAM read command and the time that the data was received.
3.1.3.3 DRAM RAS# to CAS# Delay
This field is used to select the latency between the DRAM active command and the read/write command.
3.1.3.4 DRAM RAS# Precharge
This field is used to select the idle clocks after issuing a precharge command to the DRAM.
3.1.3.5 Precharge Delay (tRAS)
The options are Auto, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15.
3.1.3.6 System Memory Frequency
This field is used to select the memory clock speed of the DIMM.
3.1.3.7 SLP_S4# Assertion Width
The options are 1 to 2 Sec., 2 to 3 Sec., 3 to 4 Sec. and 4 to 5 Sec.
3.1.3.8 System BIOS Cacheable
When this field is enabled, accesses to the system BIOS ROM addressed at
3.1.3.9 Video BIOS Cacheable
As with caching the system BIOS, enabling the Video BIOS cache will allow access to video BIOS addresssed at C0000H to C7FFFH to be cached, if the cache controller is also enabled.The larger the range of the Cache RAM, the faster the video performance.
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