Advanced Chipset Features Setup Menu - Abit AB-SA7 Manual

Introducing the BIOS

4-4. Advanced Chipset Features Setup Menu

The 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 Fail-Safe Defaults" or "Load Optimized
Defaults" option).
You can use the arrow keys to move between the items. Use PgUP, PgDn, + or - key to change the values.
When you have finished setting up the chipset, press <ESC> to go back to the main menu.
The parameters in this screen are for system designers, service personnel, and technically competent
users only. Do not reset these values unless you understand the consequences of your changes.
Advanced DRAM Control 1:
This item can let you set several items concerning the DRAM parameters. If you do not understand what
each item does, please keep the default settings. Wrong settings may cause system unstablity, data loss or
even prevent boot up!
System Performance:
Five options are available: Safe Mode ( Normal Mode ( Fast Mode ( Turbo Mode ( Ultra Mode.
The default setting is Normal Mode.
CAS Latency:
Three options are available: 2T ( 2.5T ( 3T. The default setting is 2.5T. You can select SDRAM CAS
(Column Address Strobe) latency time according your SDRAM specification.
DRAM Addr/Cmd Rate:
Three options are available: Auto Mode ( 1T ( 2T. The default setting is Auto Mode. When the host
(northbridge) locates the desired memory address/command, it then processes the wait state of
address/commands. Set it to 2T for system compatibility or to 1T for system performance.
Back to Advanced Chipset Features Setup Menu Here:
Prefetch Caching:
Two options are available: Disable or Enable. The default setting is Disable. This item controls the
prefetch caching for PCI slave control.
Memory Hole At 15M-16M:
Two options are available: Disable or Enable. The default setting is Disable. This option is used to free up
the memory block 15M-16M. Some special peripherals need to use a memory block located between 15M
and 16M. We recommend that you disable this option.
Note
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User's Manual