killerswit2013 :
yep i agree. u cant overclock ur cpu.
but tell me first why do u want to do that?
In any case if system load increases, ur cpu will run at higher clock speed @3.9. there is no need for u to manually overclock it to 3.9.
my flightsimulator x is the worst frame killer on the maked far as i now, my fps is about from 15-155 pending wher i am in the scenery but the fsx is almoast 8yers old but it suports intel hypertrading DirectX 10 multi core cpu still it kills my frame the fsx is cpu hungrey and needs atleast 8-16gig ddr3 1600hhz ram and geeforce 780 graphic card stil it kills my fps