I have a amd a6 3600 I get around 40 fps on all new games like titanfall bf4 on completely max setting my processior is 95% the intire time playing and gpu at 60% so I know I need a better processior to push gpu
So I was wondering how many fps I would gain in these games with a i5 4670
I'm not entirely sure how many more FPS you'll get out of upgrading your CPU, however the i5-4670 would most likely provide a significant performance boost over your current A6-3600. The i5 not only has stronger per core performance, but overall is more superior, hence should provide you a better game play experience. Your current CPU is somewhat weak to be honest.
The GTX 650 Ti is ideal with an i5, hence I would advise upgrading. If you're from the United States, you could go with the following: