actually i do have a spare nvidia its a 7000 series but i dont know the exact model how would that do
Not that well. A 4870 or 5770 is going to be several steps up from it.
Also, I'm not sure what particular card you have, but a lot of the 7000 series only support DirectX 9. Maybe all of them, though I haven't looked at every single one. You'll want to have at least DirectX 10, which is the current standard.