Ok bro it should be in the bios where you can change the fsb rate, it should be something like 12x as a default try changing it to 13x and see if their is a change in your core speed of the chip, also remember when clocking u may need to up the voltage abit, but forget that for now just try putting the multiplyer up by 1 for a test, if the change makes no speed increase go back into the bios and see if it has gone back to 12x if so u may find that the chip is locked, let us know how it goes,
and just incase u ask press the DEL button to get into the bios at the start of power up of the machine,
ow also if u get just a blank screen after clocking then u need to reset the cmos bat, put the jumper on pin 2-3, after taking the power cable out of the back of the pc, leave for 20 secs then put the jumper back on pin 1-2 then plug the power back in, u will have to set ur bios settings again, but worth it when it comes to OC ing,
Good Luck, Keep me informed,