yeah, it's safe o overclock just don't get too nuts! generally, the 450 isn't that forgiving in the oc area. however, there are programs that can and actually work too keep your cpu at it's coolest. program of choice is cpuidle. am curently running a pIII 500 oc'd @ 600. temp. has never reached anything over 32c. without cpuidle my system operated at an average of 45-52c. give it a shot.