No one OC his CPU for gaming, the stock i5 is plenty for gaming, Unless the CPU stock speed is not enough for intensive demanding games, also you will see a very noticeable difference when you are rendering or encoding.....Overclocking does not kill you CPU unless you are really doing it wrong...it won't either shortness you CPU life time if you are running under safe, proper volt, and with high performance liquid cooling solutions, the heat is not an issue any more..