Thank everyone for your help!
So I already DECIDE that we would will buy the Nvidia 800GT!
Mean, if I want buy the Nvidia 800GT so maybe I should take empty copy cd on some trainz game program, trainz notepad or don't need when they will have removed some old graphic video then new Nvidia 800GT put on it then will they be fine?
So I already DECIDE that we would will buy the Nvidia 800GT!

Mean, if I want buy the Nvidia 800GT so maybe I should take empty copy cd on some trainz game program, trainz notepad or don't need when they will have removed some old graphic video then new Nvidia 800GT put on it then will they be fine?