No. You aren't.Yep, so with regards to bottlenecking it is not exactly a huge bottleneck but I am definitely loosing in excess of 10% of my FPS (on the overclocked R9 290) in heavy CPU bound and Modern titles.
The cpu takes the game code, uses it to place every object, figure out Ai, do all the processing etc for every frame and then sends all that data to the gpu. THAT is your FPS Limit, the amount of times the cpu can accomplish doing everything for one frame in one second.
The gpu has to create the picture from that data according to detail settings and resolution. It either can or cannot do that.
What you get from a cpu is it, that's the number. FPS is set by the CPU, not the GPU. Just because your gpu might be capable of more does not mean the cpu is bottlenecking it, it just means in those games the gpu has extra resources. In other games it may not and be the bottleneck for cpu fps output.
You aren't loosing anything. You just have a gpu capable of more in those titles. I'd rather have that and be able to play at Ultra, than a fully capable cpu and a gpu requiring Medium settings just to keep up the fps.