This clip is for AMD users, but NVIDIA users can use Nvidia Inspector for same effect
Thanks to this topic: Hints for those who have FPS drop issues - i'm trying to help
Isn’t this for AMD user only?
Edit: Nvm i was just being stupid
Bumb 
I get 60 FPS on everything, except once there’s many characters and lost of crazy ■■■■ happens then the FPS drops. I got a high-end PC so obviously that doesn’t happen with games like The Division, GTAV and so on. Kinda weird …
MSI GTX 970 OC with 32GB @ 2400Mhz and an i7 4770K.
Cuz the game have bad optimization, plus Steam cause some problems too.