My PC is likely below specs (i7 2600K 8 Gig RAM, Nvidia 780ti) but the game runs well apart from sometimes in game I start to get jitters when I look about. These jitters will stay unless I restart the game but I have figured out that if I activate the ingame menu (in the middle of a battle - not the main menu) and leave it for a few seconds the jitters stop and I can go back into the game as normal. (Does the game sometimes need time to expel textures from RAM and a few seconds in the menu gives it time?) Optimisation may help this issue.