So I recently installed this on my windows 8 machine (laptop). Previously, i used to start the game with the default executable, which is assassinscreed_game.exe. I guess that would launch the game on dx10 mode by default on systems higher than windows Vista. I used to get a horrible lag in this mode. Some areas lagged so heavily, the frame rates would drop drastically making the game almost unplayable.
I did some research on google and some forums where people said that the problem is solved when you launch the dx9 version of the game. I tried it and, guess what...it worked. No more lags and fps drops. The game ran as smooth as butter even in graphic intensive areas.
Does anyone know why this happens. Windows 8 is a dx11 compatible system and even my version of diectx is 11. I think it should run the dx10 mode without any problems. But unfortunately that's not the case