Asus P5B - Manual (Page 82)

4-8 Chapter 2: BIOS setup
FSB Termination Voltage [Auto]
Allows you to select the FSB termination voltagae or set it to auto for safe mode.
Configuration options: [Auto] [1.200V] [1.300V]
The following items appear only when the AI Tuning item is set to [Manual].
CPU Frequency [200]
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 00 to 400. Refer to the table below for
the correct Front Side Bus and CPU External Frequency settings.
PCI Express Frequency [Auto]
Allows you to select PCI Express frequency.
Configuration options: [Auto] [90] [91] [92] [93]... [150]
PCI Clock Synchronization Mode [Auto]
Selects the PCI Clock Synchronization mode.
Configuration options: [Auto] [33.33MHz]
FSB/CPU External Frequency Synchronization
Front Side Bus CPU External Frequency
FSB 066 266 MHz
FSB 800 200 MHz
FSB 533 33 MHz
Refer to the CPU documentation before setting the CPU VCore voltage. A very
high Vcore voltage can severely damage the CPU!
The following items appear only when the AI Tuning item is set to [Manual] or
[AI N.O.S.].
Memory Voltage [Auto]
Allows you to select the memory voltage or set it to auto for safe mode.
Configuration options: [Auto] [1.80V] [1.90V] [2.00V] [2.10V]
CPU VCore Voltage [Auto]
Allows selection of the CPU VCore voltage. The configuration options vary
depending on the CPU installed. Setting to Auto allows the BIOS to detect the
VCore voltage of the CPU installed.