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 650. Refer to the table below for the correct Front Side Bus and CPU External Frequency settings.

FSB/CPU External Frequency Synchronization

Front Side Bus

CPU External Frequency

FSB 1066

 MHz

FSB 800

00 MHz

The CPU Frequency item appears only when you set the AI Tuning item to [Manual].

N.O.S. Mode [Auto]

Allows you to set the N.O.S. mode.

Configuration options: [Auto] [Standard] [Sensitive] [Heavy Load]

The N.O.S. Mode item appears only when you set the AI Tuning item to [AI N.O.S.].

DRAM Frequency [Auto]

Allows you to set the DDR operating frequency.

Configuration options: [Auto] [DDR2 - 533MHz] [DDR2 - 667MHz] [DDR2 - 800MHz] [DDR2 - 889MHz] [DDR2 - 1067MHz]

Selecting a very high DRAM frequency may cause the system to become unstable! If this happens, revert to the default setting.

• The DRAM Frequency item always appears on the Advanced menu.

• The following items appear only when you set the AI Tuning item to [Manual]

PCI Express Frequency [Auto]

Allows you to set the PCI Express frequency. This item is set to [Auto] by default. Configuration options: [Auto] [90] [91] ~ [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]

ASUS P5B-E

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