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.

4.4.4DRAM Frequency [Auto]

Allows you to set the DDR3 operating frequency.

Configuration options: [Auto] [DDR3-667MHz] [DDR3-800MHz] [DDR3-835MHz] [DDR3-887MHz] [DDR3-1002MHz] [DDR3-1066MHz] [DDR3-1111MHz] [DDR3- 1333MHz] [DDR3-*1600MHz*] [DDR3-*1800MHz*] [DDR3-*2000MHz*]

• The DRAM Frequency configuration options vary with the FSB Frequency settings.

•When the DRAM Frequency item is set to [DDR3-*1600MHz*], [DDR3- *1800MHz*] or [DDR3-*2000MHz*], the FSB Frequency and CPU Ratio Setting items will be optimized automatically.

•Selecting a very high DRAM frequency may cause the system to become

unstable! If this happens, revert to the default setting.

•DDR3-667 help: DRAM frequency lower than 800 MHz may cause system boot failure due to spec violation.

4.4.5DRAM Command Rate [Auto]

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

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

ASUS P5E64 WS Evolution

4-19