+1
Generally speaking, you should NOT experience too much bottlenecking. An i3 2120 can run games just fine with a GTX670 (Phenom II X4 965 is roughly equivalent to an i3 gaming wise). Keeping that in mind, a GTX670 isn't far ahead a Radeon HD7950.
Even if you were to experience bottlenecking, I wouldn't expect it to be very severe.