First, the game runs like complete ass. I have a i7 3770k with 8GB of RAM and a dedicated GPU, a XFX 7950. The amount of lag on the map is just ridiculous, and the frames when moving around are so choppy.
I have similar but slightly lower specs to you, for example only 4GB RAM. I also use full HD encryption which eats a small amount of performance. I don't have any lag or display issues at all with Art of War. I play on Linux using a quite minimal XFCE desktop. Maybe some maintenance on OS or drivers could improve things for you? maybe a clean reinstall of Windows? What about other games, any performance issues there? Tried changing the graphic settings in the game? I'm just saying there must be some explanation and then also some way to improve things for you because the hardware should be able to handle it.