So I am currently thinking about getting a new graphics card for my desktop which I built in 2012. I currently have the gtx 560 ti and was thinking about putting in the new gtx 970. I'm not sure if running both of these together will be a lot better than just replacing the 560 ti since they are so far apart. Also if I were to use both of them would I be able to enable SLI, again since they're so far apart.