Hi, I am considering a video upgrade and am wondering how much my CPU/motherboard comes into play. I have a 6 core phenom AMD CPU and Asus matching motherboard both from a 2010 build. Can I find a substantial gain by replacing my ati 5830 era video card with something newer? Or should I just pack it up and realize I need to build a new system? What are the parameters that I need to pay attention to? Thanks.