Abit AB-BF6, Manual

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3-20 Chapter3
BF6
3-4. Advanced Chipset Features Setup Menu
The Advanced Chipset Features Setup Menu is used to modify the contents of the buffers in
the chipset on the motherboard. Since the parameters of the buffers are closely related to
hardware, if the setup is not correct or is false, the motherboard will become unstable or you
will not be able to boot up. If you don’t know the hardware very well, use default values (i.e.
use the Load Optimized Defaults option). The only time you might consider making any
changes is if you discover that data is being lost while using your system.
Figure 3-6. Advanced Chipset Features Setup Screen Shot
You can use the arrow keys to move between the items. Use
)
,
*
and Enter
key to change
the values. When you have finished setting up the chipset, press Esc to go back to the main
menu.
The first chipset settings deal with CPU access to DRAM. The default timings have been
carefully chosen and should only be altered if data is being lost. Such a scenario might well
occur if your system has mixed speed DRAM chips installed so that greater delays may be
required to preserve the integrity of the data held in the slower memory chips.
SDRAM RAS-to-CAS Delay
Two options are available: 2 and 3. The default setting is 3 . This item lets you insert a timing
delay between the CAS and RAS strobe signals, used when DRAM is written to, read from,
or refreshed. Fast gives faster performance; and Slow gives more stable performance. This
item applies only when synchronous DRAM is installed in the system.