With that question asked, I think you're completely new to PC components. Overclocking means increasing the performance of the processor (or GPU) by increasing CPU multiplier (and/or its voltage). This helps when the CPU becomes old for the new applications released in future and saves the cost of upgrading to a new CPU. But, it needs extreme care to do o because the motherboard and CPU can be *burnt* if not done with care and overclocking voids the warranty too. Stay with the above build. It will help after you've learnt hat overclocking is.