Ok so I bought a new computer and new monitor. The monitor has both vga and dvi ports but my computer only has vga. I have windows media center and i watch tv on it but it seems like it should be a better picture. Now my computer came with a nvidia geforce 6150 se graphics card but i dont really know if that is good. first, do i need to buy a new graphics card in order to get a dvi port on my computer? also, what are the advantages of dvi over vga b/c i've heard that dvi will be more crisp. any help would be greatly appreciated.