PX845EV1/ PX845EV1 PRO
12
Frequency / Voltage Control
This mainboard automatically detects and recognizes the CPU ratio. You can otherwise
override these values using the BIOS Setup Utility.
Configuring the CPU Host Frequency by using the
BIOS Setup Utility
To access the BIOS Setup Utility, reboot your system. During the reboot process you will be
given an opportunity to press the “DEL” key to enter the BIOS Setup Utility.
From the BIOS Setup Utility access the “Advanced BIOS” section and then scroll down to
the “Frequency / Voltage Control” field. Adjust the “CPU Clock Ratio”, “CPU Host
Frequency” and “DDR:CPU Ratio” according to the formulas below.
CPU Speed = CPU Clock Ratio
*
CPU Host Frequency
DDR Speed = DDR: CPU Ratio
*
CPU Host Frequency
For more details, please refer to Frequency / Voltage Control in Chapter-2 BIOS Setup.
Watch Dog Timer
This mainboard comes with a special feature called “Watch Dog Timer” which is used to
detect when the system is unable to boot using the manual over-clocking configurations.
After you power on the system, BIOS will check the last system POST status. If it was
successful, BIOS will enable the “Watch Dog Timer” feature and set the CPU frequency
values to the user configured values stored in the BIOS. If unsuccessful the “Watch Dog
Timer” will reboot the system.
On most systems you would need to remove the cover of your system and re-jumper the
clear CMOS switches on the mainboard when your system encounters over-clocking
problems. With the “Watch Dog Timer”, overclocking settings will be automatically cleared
and reset.
Before Overclocking
Please make sure your system components are capable of overclocking.
If you are not familiar with the overclocking, we strongly recommend that you to
set the clock to the default settings.
