Title said pretty much everything. I'm in 3D and I want to get a 2nd graphic card to make my renders fasters. I actually have the graphic card that came with the computer (nVidia GeForce GT 120 with 512 MB - I think). I know absolutely nothing about graphic cards so I'd like to know what's the options that open to me and what's the ones that would be the best for me (3d render).