I just recently upgraded my computer in the last few weeks. Before i upgraded, for CPU, i was using a AMD Phenom II x6 1045t 2.7. Ghz, and for GPU i was using the Asus GTX 560Ti. The game ran but it wasnt that great, didnt run so smoothy, FPS was low during PvP and some Ops and where there were a lot of people in one area. A lot of jittery everywhere!
But once i upgraded to the Intel core i7 4790k 4.0 Ghz, and the new Nvidia GTX 980Ti... OMG the game runs so much better. I get 30-40 FPS in Ops and still really good FPS for pvp. And when im in areas where theres a lot of people, i get around 40-50 FPS.