Computer Help Please?

[TGST]

and also. Whats all the different types of graphics cards?

Theres like, Asus, PNY, EVGA, PALIT, ZOTAC, CUDA, INNO.

They are some of the manufacturers of graphic cards. Some produce them cheaper, some produce them more expensively. Of course the more expensive ones have more high quality components compared to the cheaper ones. But the differences between them are not humongous.