Last post I told that I bought a new laptop that is Dell Inspiron 1427.
Just now I download the latest driver of Ndivia Geforce 9M driver that is 186.03.
I test it on my laptop although it says need confirm with Dell whether is supported driver. The result is it installed without any problem. In fact, I try play Tomb Raider Underworld which is a quite high demanding game. It really increase fps when I play the game, the different is really visible. I can now enjoy smoother game play.