Instruction Manual

2-14 Chapter 2: BIOS setup
The follow items appear only when you set the Ai Overclocking item to [Manual].
CPU Frequency [xxx]
Displays the frequency sent by the clock generator to the system bus and PCI bus. 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 200 to 600. 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 1600 400 MHz
FSB 1333 333 MHz
FSB 1066 266 MHz
FSB 800 200 MHz
FSB 533 133 MHz
PCI Express Frequency [Auto]
Use the <+> and <-> keys to adjust the PCIe frequency. You can also type the desired PCIe
frequency using the numeric keypad. The value ranges from 90 to 150.
SB Voltage [Auto]
Allows you to set the Southbridge voltage. Conguration options: [Auto] [1.1V] [1.2V]
Vcore Over voltage [Auto]
Allows you to set the Vcore Over voltage. Conguration options: [Auto] [+0mV] [+50mV]
[+100mV] [+150mV]
FSB Termination Voltage [Auto]
Allows you to set the FSB termination voltage. Conguration options: [Auto] [1.205V] [1.28V]
CPU Voltage [Auto]
Allows you to set the CPU Vcore voltage. Use the <+> and <-> keys to adjust the CPU Vcore
voltage. You can also type the desired CPU Vcore voltage using the numeric keypad. The
value ranges from 0.85000V to 1.55000V with a 0.00625V interval. Conguration options:
[Auto]
Refer to the CPU documentation before setting the CPU Vcore voltage. Setting a high
VCore voltage may damage the CPU permanently, while setting a low VCore voltage may
make the system unstable.
CPU GTL Reference [Auto]
Allows you to set the CPU GTL voltage reference. Conguration options: [Auto] [0.667V]
[0.65V] [0.63V] [0.615V]
Setting a very high voltage may damage the component permanently, while setting a very
low voltage may cause the system to become unstable.