hello,can anybody help me,this is my case,i just got my g55vw(non3d),with gtx660m graphics card,8gb ram,but when i play gta iv , it is already extremely lag in the very begining, i cannot even play for a second because it is extremely lag when it is not suppose to happended coz other g55 user have not experice this kind of problem. what is the problem?or i have something i havent installed yet because when i got my laptop i did not install the additional driver that the laptop provided. please help me, thanks!!!