My god, magpienja, is that thing running on steam!!
Basically, you will have to update it. Not just the graphics card (which is very important as it is the part that says what appears on the screen in front of your eyes) but the whole 'puter, as methinks the CPU will struggle with a newer card.
As Herr Drapes says, a decent internet connection is also a must. But the biggest issue is the machine you are using.