So i have just recently bought AC3 for pc And the first thing i notice when i entered Boston and the frontier there is a HUGE FPS dip than being on the ship. I get around 14-20 fps on highest settings with no AA and on lowest im barely pulling a 30 fps I am running a AMD HD 7850, FX 6300, 4 gigs of ram and i have no idea why this is doing this. I have tried tweaking the .ini files exiting the game and opening up task manager nothing seems to work. I run Skyrim Max settings highest AA 1080p with 60fps. Please help im about to give up