Get "bottlenecking" out of your vocabulary. It's a bogus concept that pretends there's some kind of natural balance between a CPU and GPU.
That is false. With a specific GPU and CPU combo, the GPU might be the "bottleneck" in one game, and the CPU might be the "bottleneck" in a different game.
That's the TL;DR version.
And, NEVER, EVER use a bottleneck calculator. They are worse than useless.