Earlier I was using two AMD graphic card in my computer and system was working properly and then I decided to change graphic cards in my computer and that is why I have bought two Evga GeForce GTX 680 graphic card and done all required SLI setting according to instruction but the problem which I am facing is with the frame rates which drops annoyingly. While searching information on internet regarding this problem I have come to know that there are many users who face similar problem but there were no proper solution mentioned regarding this. I have removed graphic card from my computer and then connected it properly again but that didn’t make any difference. what should I do to solve this problem. any help will be appreciated.