MSI G41M-P25 User Manual page 22

Overckx* FSB Switch: OC_SW1 (optional)
You can overclock the FSB to increase the processor frequency by changing the
switch. Follow the instructions below to set the FSB.
O N
O N O N
O N
B U B B B B
B B B В У У
1 2 3 1 2 3 1 2 3 1 2 3
Default 200-»266 MHz 200-»333 MHz 266-»333 MHz
IMPORTANT
' Make sure that you power off the system before setting the switch.
* When overciocking cause system instability or crash during boot, please set the
switch to default setting.