I give up, I don't think there's anyway i can convince you of your mistakes here.
I defy you to present even a single app ever created by AMD or NVidia that has ever reached the full theoretical performance of a piece of hardware they produced. Just one.
Try taking a look at overclocking your memory versus overclocking the cores. Notice that 1 will make more of a difference? Notice that it will often depend on the app you are using as to which one matters more? Notice that effects are often completely different on other models?