i almost positive i will be getting a second MSI geforce gtx 780 to put in my Rig, but i was watching a video on neweggs youtube channel on the pro's and cons of SLI and he said one of the cons was some games require some "software tuning". i'm not sure what he meant by that, but if i get SLI GPU's, will i have to tweak settings in my games to get them to perform better? i thought the reason of SLI was so i wouldn't have to tweak settings and i could run them all at the highest settings. maybe someone can tell me what he was talking about. if you'd like to see the video i'll link it, and just skip to 1:53, and the topic ends at 2:25. here's the vid: https://www.youtube.com/watch?v=ZphJB5cUNKE someone please help me understand. thanks!