I'm building my new PC (mostly for gaming) and I'm not quite sure about the OC. I never did OC (I'm old school, I did not play modern video games for many years). So my question is: How important it is that the processor is K or not-K for gaming? Is it really necessary for "good results"? Do you currently have to install an i7 for optimum quality, or an i5 is enough? Thanks guys!