Asus P4P800S - Manual (Page 55)

ASUS P4P800S motherboard user guide 2-17
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AI Overclock Tuner [Manual]
CPU External Frequency (MHz) [100]
DRAM Frequency [Auto]
AGP/PCI Frequency (MHz) [Auto]
CPU VCore Voltage [Auto]
DDR Reference Voltage [Auto]
AGP VDDQ Voltage [Auto]
Performance Mode [Auto]
Configure System Frequency/Voltage
When you set the AI Overclocking Tuner item to [Manual], the related
overclocking items appear.
If you are using an unlocked CPU, the item CPU Ratio appears under the AI
Overclock Tuner item. You may select your desired ratio from the available
options.
CPU Ratio [12]
This field sets the ratio between the CPU Core Clock and the Front Side Bus (FSB)
Frequency.
If an invalid ratio is set in CMOS, the actual and setpoint values may differ.
Performance Mode [Auto]
Allows enhanced system performance. Setting to [Turbo] may cause the system to
become unstable. If this happens, revert to the default setting [Auto]. Configuration
options: [Auto] [Standard] [Turbo]
CPU External Frequency (MHz) [XXX] (value is auto-detected)
Indicates the frequency sent by the clock generator to the system bus and PCI
bus. The bus frequency (external frequency) multiplied by the bus multiple equals
the CPU speed. The value of this item is auto-detected by BIOS and is not
manually configurable. The values range from 100 to 400. Refer to the following
table for the correct Front Side Bus and CPU External Frequency settings.
Front Side Bus CPU External Frequency
FSB 800 200 MHz
FSB 533 133 MHz
FSB 400 100 MHz
Table 2.4.1 FSB/CPU External Frequency Synchronization