I went into my bois and changed the cpu ratio to 4ghz when i open cpu-z i look at the core speed it dips up and down must it do that?but when i run quick stress test it go`s to 4ghz dip like to 3999ghz,so is it overclocked or not?should it be stable at 4ghz and not dip?if must stable what must i do it is an intel g3258