If you're experiencing a lot of stuttering in game while moving quickly, or simply at all then this might help you. I'd recommend turning off your page file. Doesn't stutter at all anymore for me and my frame rate is a lot higher. Also recommend going into "C:\Users\"your username"\Documents\My Games\Far Cry 4". Open GamerProfile.xml with notepad and search for "GPUMaxBufferedFrames". Then change it from 0 to 3-4. Don't know if this will work for anyone else but it could be worth giving it a try.