Bottleneck for what? This depends entirely on the usage scenario in question.
For gaming, strange though it might seem your GPU system will still be the bottleneck in most situations. Even with a system as powerful as yours. This is especially true if you overclock your CPU to its maximum potential. It is technically true that your CPU might sometimes be the limiting factor in your frame rates, but this will probably only be in circumstances where the frame rate is so high that a CPU bottleneck is of no practical relevance. I'm of the view that the performance of a system in games should be judged by the minimum frame rate rather than the average. In complex scenes with all the effects maxed and with a high draw distance, the part of your system that determines the minimum frame rate will still be your GPU.
For video editing or transcoding, your bottleneck will be entirely your CPU. For disk intensive operations like booting, your bottleneck will be your SSD.