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3-3 Advanced Chipset Features
By choosing the [
Advanced Chipset Features
] option from the CMOS Setup
Utility menu (Figure 3-1), the screen below is displayed. This sample screen
contains the manufacturer's default values for the motherboard.
Figure 3-4 Advance Chipset Features
All of the above settings have been determined by the motherboard
manufacturer and should not be changed unless you are absolutely sure of
what you are doing. Explanations of the DRAM timing and chipset features
setup are lengthy, highly technical and beyond the scope of this manual. Below
are some brief descriptions of the functions in the Setup menu.
DRAM Timing Selectable
The function allows you to enable or disable the DRAM timing by SPD. It is
recommended to keep the default setting for a stable system operation.
CAS Latency Time
This item controls the latency between DRAM read command and the time the data
actually becomes available.
Active to Precharge Delay
This item controls the number of DRAM clocks used for DRAM parameters.
DRAM RAS# to CAS# Delay
This item controls the latency between DRAM active command and read/write
command.
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DRAM RAS# Precharge
This item controls the idle clocks after issuing Precharge command to the DRAM.
Memory Frequency For
Please leave the default system setting [
Auto
] for a stable system operation.
WARNING
Overclocking:
This motherboard is designed to support overclocking.
However, please make sure your components are able to
tolerate such abnormal setting, while CPU clock speed is
overclocked. Any attempt to operate beyond product
specifications is not recommended.
We do not guarantee
the damages or risks caused by inadequate operation or
beyond product specifications
.
System BIOS cacheable
Enabling this function allows caching of the system BIOS ROM at F0000h-FFFFFh,
which results in better system performance. However, if any program writes to this
memory area, a system error may result. It is advised to leave this setting. Caching
the system BIOS results in better performance than shadowing the system BIOS.
Video BIOS Cacheable
Enabling this function will allows caching of the video BIOS, resulting in better
system performance. However, if any programs write to this memory area, a system
error may occur.
Memory Hole at 15M-16M
Enabling this function will reserve the memory address space between 15MB and
16MB for ISA expansion cards. However, it will also result in not allowing the
system to have access to memory above 16MB. Please note that some expansion cards
require this setting to be enabled. The default setting is Disabled. If Auto
Configuration is enabled, you must set the DRAM timing function to 60ns or 70ns,
depending on the type of DRAM you install.
Delay Prior to Thermal
Available options are 4, 8, 16 and 32 min.
AGP Aperture Size (MB):
This function determines the amount of system memory that is given to the AGP
card. Available options ranges from
32MB
to
512MB
. This is a dynamic memory
allocation in that the AGP card will only use the amount of memory that it needs.