ATI Hd4650 graphical glitches

hello thanks for reply
i turn it on vsync and anti aliasing on
same problem
i think its the video card the problem?
my computer set is new i bought it last month
also the video card
i dont overclock i dont make changes on my pc only the settings on the game
hmmmmmm need help from this
 
and by the way it runs smoothly but the problem is that annoying lines textures it has a shadow also
i play call of duty modernwarfare 2 and it has the same problem it make me killed from the enemies because i cant see them the lines covers my visual
sorry for my english
hope any one understand me and help me fix this problem
thanks by the way NNA2