Asus P5B Deluxe/WiFi-AP - Manual (Page 87)

ASUS P5B Deluxe 4-17
FSB/CPU External Frequency Synchronization
The following items appear only when you set the AI Tuning item to [Manual].
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.
Available DRAM frequency options in various FSB settings
* Provided for overclocking purpose only.
Selecting a very high DRAM frequency may cause the system to become
unstable! If this happens, revert to the default setting.
DRAM Frequency [Auto]
Allows you to set the DDR operating frequency.
Configuration options:
Front Side Bus CPU External Frequency
FSB 10 MHz
FSB 00 00 MHz
FSB Configuration options
Auto DDR- DDR- DDR- DDR- DDR-
00 9* 10*
FSB 10 • • • • • •
FSB 00 • • • •
PCI Express Frequency [Auto]
Allows you to set the PCI Express frequency. This item is set to [Auto] by default.
Configuration options: [Auto] [100] [101] ~ [149] [150]
PCI Clock Synchronization Mode [Auto]
Allows you to synchronize the PCI frequency with the PCI Express or CPU frequency.
Configuration options: [Auto] [33.33MHz]
Spread Spectrum [Auto]
Allows you to enable or disable the clock generator spread spectrum.
Configuration options: [Disabled] [Enabled] [Auto]
The DRAM Frequency item also appears when you set the AI Tuning item to [AI
NOS].