MSI G4m-P23 User Manual page 20

overclock FSB Switch: oC_SW
you can overclock the FSB to increase the processor frequency by changing the
switch. Follow the instructions below to set the FSB.
default
imPoRtant
* make sure that you power off the system before setting the switch.
* When overclocking cause system instability or crash during boot, please set the
switch to default setting.
20
200➔266 mHz 200➔333 mHz 266➔333 mHz