Overcloking

we all know that warrock to make the character faster and then overclock you have to raise fsb / bclk from windows through software. Not cpu can do this for effect WarRock fps,only old cpu Like lga 775/1366

it happened to me after a year that I was inactive that raising of fsb after I do not know exactly and what really happens the character or the weapons return to walk or shoot normal as if overclocking does not work anymore ...

months back I could make 200 + fps on warrock opening fraps which is the utility that can see the real fps on warrock ...

I can not figure out how they overclocked or at least partially ...
is there anyone who knows or has found a solution?
can someone explain why overclock is not working anymore?

I await an answer
Sorry for bar Englis