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3-16 Chapter 3: BIOS setup
3.4.2 CPU Ratio Setting [Auto]
Allows you to adjust the ratio between CPU Core Clock and FSB Frequency. Use
the <+> and <-> keys to adjust the value.
Conguration options: [Auto] [06.0] [07.0] [08.0]
FSB/CPU External Frequency Synchronization
Front Side Bus
FSB 1600 FSB 1333 FSB 1066 FSB 800
CPU External Frequency
400 MHz 333 MHz 266 MHz 200 MHz
The following two items appear only when you set the Ai Overclock Tuner item
to [Manual].
FSB 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 FSB frequency. You can also type the desired CPU frequency using the
numeric keypad. The values range from 200 to 800. Refer to the table below for
the correct Front Side Bus and CPU External Frequency settings.
PCIE Frequency [Auto]
Allows you to set the PCI Express frequency. Use the <+> and <-> keys to adjust
the PCIE frequency. The values range from 100 to 180.
3.4.3 FSB Strap to North Bridge [Auto]
When set to [Auto], the FSB Strap will be adjusted automatically by FSB
Frequency and DRAM Frequency.
Congifuration options: [Auto] [200 MHz] [266 MHz] [333 MHz] [400 MHz]
3.4.4 DRAM Frequency [Auto]
Allows you to set the DDR2/DDR3 operating frequency. The conguration options
vary depending on the DIMMs you install on the motherboard.
(For DDR3 DIMMs) Conguration options: [Auto] [DDR3-533MHz]
[DDR3-639MHz] [DDR3-667MHz] [DDR3-709MHz] [DDR3-800MHz]
[DDR3-852MHz] [DDR3-887MHz] [DDR3-1066MHz]
(For DDR2 DIMMs) Conguration options: [Auto] [DDR2-667MHz]
[DDR2-800MHz] [DDR2-889MHz] [DDR2-1066MHz]
The DRAM Frequency conguration options vary with the FSB Frequency
item settings.
Selecting a very high DRAM frequency may cause the system to become
unstable! If this happens, revert to the default setting.