Asus PCI/E-P54NP4 User Manual page 88

The following item appears when you set Ai Overclock Tuner to [Manual].
FSB Frequency [XXX]
Displays the frequency sent by the clock generator to the system bus and PCI
bus. Use the <+> and <-> keys to adjust the FSB frequency. You can also type
the desired FSB 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.
FSB/CPU External Frequency Synchronization
Front Side Bus
PCIE Frequency [XXX]
Allows you to set the PCI Express frequency. Use the <+> and <-> keys to adjust
the PCIE frequency. You can also type the desired value using the numeric
keypad. The values range from 100 to 180. This item appears when you set Ai
Overclock Tuner to [Super MemProfile] or [Manual].
DRAM Frequency [Auto]
Allows you to set the DDR2 operating frequency.
Configuration options: [Auto] [DDR2-667MHz] [DDR2-800MHz] [DDR2-835MHz]
[DDR2-887MHz] [DDR2-1002 MHz] [DDR2-1066MHz] [DDR2-1111MHz]
[DDR2-1335MHz] [DDR2-*1200MHz*]
The DDR2 frequency reaches 1200 MHz after overclocking.
A very high DRAM frequency may cause the system to become unstable! If this
happens, revert to the default setting.
The configuration options may vary depending on the CPU level you select.
DRAM Command Rate [Auto]
Select [1N] to obtain better DRAM performance; select [2N] to enhance DRAM
overclocking ability. Configuration options: [Auto] [1N] [2N]
The following two items become configurable when you set DRAM Command
Rate to [1N].
4-18
CPU External Frequency
FSB 1600
FSB 1333
FSB 1066
FSB 800
[DDR2-667MHz] [DDR2-800MHz] [DDR2-835MHz]
[DDR2-1002 MHz] [DDR2-1066MHz] [DDR2-1111MHz]
[DDR2-*1200MHz*]
400 MHz
333 MHz
266 MHz
200 MHz
Use the <+> and <-> keys to adjust
[DDR2-1066MHz] [DDR2-1111MHz]
[DDR2-835MHz]
Chapter 4: BIOS setup