|Hi, maybe you can try the following steps.|
Shut down your computer.
Start up the computer, and press the appropriate key to enter
BIOS setup when prompted. A brief prompt should appear and
indicate which key you must press to enter BIOS setup.
Standard keys are the "delete" and "F" buttons. Sometimes
the prompt is so brief you might not have time to find and
press the key before your computer starts up. If this happens,
restart and press the key immediately.
Use the navigation instructions in your BIOS setup utility to
find management settings for FSB (front side bus) and FSB
multiplier. These settings gauge how fast the processor is
able to work. The exact menu names and navigation
instructions you must find will vary depending on your BIOS
and motherboard. Typically you will have to use the arrow
keys to select categories, and "Enter" to open menus.
"Escape" is often used to go back and exit BIOS at the main
Alter the FSB speed and/or FSB multiplier. If you want to
increase CPU speed, set the numbers so that your CPU
speed increases by 10 to 20 percent. The menu should show
your CPU clock speed, which will change when you alter the
settings. If you want to underclock, do the same thing but use
smaller numbers for FSB and/or the multiplier.
Change CPU voltage. If you alter the CPU run speed by
changing the FSB speed, the CPU will require more or less
power. Find a field for CPU voltage and alter it by a
percentage similar to the change in CPU run speed.
Press the appropriate key to save your changes when you are
finished, and exit BIOS to resume booting.