Asus P5Q 3.4.3FSB Strap to North Bridge [Auto], 3.4.4DRAM Frequency [Auto], 3.4.5DRAM Command Rate [Auto], 3.4.6DRAM Timing Control [Auto], FSB Frequency [XXX]

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.

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

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.

3.4.3FSB 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]

3.4.4DRAM Frequency [Auto]

Allows you to set the DDR2 operating frequency.

Configuration options: [Auto] [DDR2-667 MHz] [DDR2-800 MHz] [DDR2-835MHz] [DDR2-887 MHz] [DDR2-1002MHz] [DDR2-1066MHz] [DDR2-1111] [DDR2- 1335MHz]

The DRAM Frequency configuration 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.

3.4.5DRAM Command Rate [Auto]

Set this item to [1T] to provide possibility to accelerate DRAM performance or [2T] to enhance DRAM overclocking ability.

Configuration options: [Auto] [1T] [2T]

3.4.6DRAM Timing Control [Auto]

Configuration options: [Auto] [Manual]

3-16 Chapter 3: BIOS setup