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2-20 Chapter 2: BIOS setup
CPU Frequency [XXX]
Displays the frequency sent by the clock generator to the system bus and
PCI bus. The value of this item is auto-detected by the BIOS. Use the <+>
and <-> keys to adjust the CPU frequency. You can also type the desired
CPU frequency using the numeric keypad. The values range from 100
to 400. Refer to the table below for the correct Front Side Bus and CPU
External Frequency settings.
CPU Lock Free [Auto]
Allows you to adjust the CPU multiplier to 14x. Setting this item to [Auto]
allows the motherboard to automatically reduce the CPU multiplier value for
more exibility when increasing the external FSB.
Conguration options: [Auto] [Disabled] [Enabled]
This function works with Intel
®
Prescott-cored 6xx series Pentium
®
4 CPU.
PCI Clock Synchronization Mode [Auto]
Selects the PCI Clock Synchronization mode.
Conguration options: [Auto] [33.33MHz] [To CPU]
CPU VCore Voltage [Auto]
Allows selection of the CPU VCore voltage. The conguration options vary
depending on the CPU installed. Setting to Auto allows the BIOS to detect
the VCore voltage of the CPU installed.
Refer to the CPU documentation before setting the CPU VCore voltage. A
very high Vcore voltage can severely damage the CPU!
Front Side Bus CPU External Frequency
FSB 800 200 MHz
FSB 533 133 MHz
FSB/CPU External Frequency Synchronization
DRAM Frequency [Auto]
Allows you to set the DDR operating frequency.
Conguration options: [Auto] [333MHz] [400MHz]
Selecting a very high DRAM frequency may cause the system to become
unstable! If this happens, revert to the default setting.
The following item appears only when you install a CPU that supports the
lock free feature. Only some latest CPUs support this feature.