I've been experiencing this choppiness too. My computer can run the game on max settings no problem though so it's not the graphics' fault.
I know this because i tried switching to the lowest settings possible and the choppiness didn't change at all. Also noticed that it happens
mostly when the NVIDIA Experience is running in the bg (icon showing in the system tray). When i close it, the choppiness goes away.. and
comes back again when exp is starting up in the bg again.