BIOS Setup Information
ROBO-679 User’s Manual
4-10
SDRAM CAS Latency Time
This option controls the number of SCLKs between the time a read command is
sampled by the SDRAMs and the time the GMCH samples correspondent data
from the SDRAMs.
The Choice: 2, 3 SCLKs.
SDRAM Cycle Time Tras/Trc
This option controls the number of SDRAM clocks used per access cycle.
The Choice: 5/7, 7/9 or Auto.
SDRAM RAS-to-CAS Delay
This option controls the number of SCLKs (SDRAM Clock) from a row activate
command to a read or write command. If your system installs good quality of
SDRAM, you can set this option to “3 SCLKs” to obtain better memory
performance. Normally, the option will be set to Auto.
The Choice: 2, 3 SCLKs or Auto.
SDRAM RAS Precharge Time
This option controls the number of SCLKs for RAS# precharge. If your system
installs good quality of SDRAM, you can set this option to “3 SCLKs” to obtain
better memory performance. It is set to auto normally.
The Choice: 2, 3 SCLKs or Auto.
System BIOS Cacheable
Selecting Enabled allows caching of the system BIOS ROM at F0000h-FFFFFh,
resulting in better system performance. However, if any program writes to this
memory area, a system error may result.
The choice: Enabled/Disabled.
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