What is a dedicated physics card? I also need some clarification on SLI vs Crossfire. What they are and what they do and the advantage of doing so? How can I use a dedicated physics card? Can I have either a SLI or Crossfire setup in conjunction with a dedicated Physics card? Now in mu current computer setup can I add a dedicated physics card and would it be worth doing so. I tried doing some Googleing but I'm not sure what I should be looking for.