Was just referring to the fact that you can figure out the maximum theoretical throughput of the components of your system, as well as the data bus of your motherboard and compare the results. It really isn't necessary to do.
You will only experience a bottleneck when your CPU and/or GPU are seriously mismatched. If you paired your current CPU with an R9 290X, your system would bottleneck that GPU. Your CPU wouldn't be able to handle the massive amount of data that your GPU would be sending to it.
That's why I'm saying your CPU and GPU are pretty well matched. Your GPU isn't powerful enough to bottleneck your CPU, and visa versa.