Will i see more performance if i clock it to, let say; 4.4Ghz or 4.2?
Depends... Going up by 200MHz is only a 5% and 400GHz is a good 10% increase. However, that does not mean everything will run 5% or 10% faster. The increase in performance will likely be 3% and 6%. For intensive CPU tasks like video encoding, then yes you will notice a small increase in performance. If you are talking about games, then the most likely answer is no unless you are playing a game that is really CPU intensive like Civilization 5 or MS Flight Simulator X, but even then the increase will be relatively small.