I am building my son a modest gaming computer. The base components are the ASRock Z87 Extreme 6, MSI GTX 760, and the i5 4670 chip. I doubt there will be any overclocking needed for games like WOW, Skyrim, Minecraft...ect. to run on max settings based on these components many reviews. Is there any reason to spend an extra 40 bucks just to have the ability to potentially overclock a CPU?