Will 750ti (msi oc edition) bottleneck g2020 ? Games I will play are
Bioshock infinite
Fifa 14
GTA V(when its released) (hope i can run it)
GTA IV
Battlefield 4
Maybe a little but the 750ti is only a mid-range video card so it's not going to bring it down a lot. You'll probably be fine as long as you have realistic expectations.