will an i7 4790 (non k version) bottleneck a 1080

There is no such thing as "bottlenecking"
If, by that, you mean that upgrading a cpu or graphics card can
somehow lower your performance or FPS.
A better term might be limiting factor.
That is where adding more cpu or gpu becomes increasingly
less effective.

Some games are cpu limited, particularly in single thread speeds.
Others are graphics limited.

What kinds of games do you play?

FWIW, the bottlenecker app is junk science, particularly without knowing anything about the games you play.