Asus P4S800-MX SE - Manual (Page 52)

2-18 Chapter 2: BIOS information
AGP/PCI Frequency [Auto]
Allows you to set the AGP/PCI operating frequency.
Configuration options: [Auto][ 66.6/33.3] [75.0/37.5] [85.7/42.8]
Spread Spectrum [Enabled]
Enables or disables the spread spectrum.
Configuration options: [Disabled] [Enabled]
DRAM Frequency [Auto]
Allows you to set the DDR operating frequency.
Configuration options: [266 MHz] [333 MHz] [400 MHz] [Auto]
The CPU Frequency item appears only when you set the AI Overclocking
Tuner item to [Manual].
CPU Frequency (Value 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 ranges from
100 to 400.
Front Side Bus CPU External Frequency
FSB800 200 MHz
FSB533 133 MHz
FSB/CPU External Frequency Synchronization