GT 730 with I5 3470?



Sorry, but a 'bottleneck' is simply a constraint, most commonly GPU or CPU, but could also be memory, network or drive.

In this case the GPU is constraint so the GPU will run at 100% and the CPU probably at about 25% to keep it fed.

So yes it will be a bottleneck, often the question is posed around very slight bottlenecks and there it is difficult to answer that there is a bottleneck as it might move from game to game or even within the game, this is normal and not a 'problem' as some seem to think it is, there will always be a constraint, this is just a fact.

Here however it's severe and consistent, and hence could be solved easily (better GPU).
 
Yes, ANY chokepoint, is a bottleneck. If there is ANY component that is causing other components to significantly fall short of the performance they are capable of, then it is a "bottleneck", although I hate that term. I'd much prefer it be called something else as it gets used way too loosely in some cases.