[RickRuski]

Don't know if both of your cards are from the same stable and exactly the same, if not then they may need adjustment with a software like EVGA Precision tool or similar. For Sli to work both cards must have the same V/ram (you can't mix a 1.5gb card with a 2gb card etc). My two cards are from different stables but I have clocked and voltaged them the same using Nvidia inspector, then synced both cards with PT. At the moment I have also used the fps limiter built into PT to limit the fps to 30fps. Sure I'm getting stutters but minor (micro stutters unless I'm down very low chasing a 109 or whatever) when up over about 2500 mts they virtually disappear. My two cards aren't that powerful but I'm getting good results through experimenting with settings. Don't believe what is being said about stutters being caused by Sli, if that was the case then all those running single cards wouldn't have stutters but a lot of them have (infact if they were all honest most are). My son has a quad core and a 560ti single card and has shelved Cod because of the stutters he is getting and is playing Rof where that runs silky smooth for him. I use a combination of Nvidia inspector and PT to get the results that I have, use the overclocking part of Nvidia inspector to adjust your clocks etc, it isn't just for over clocking you can use that to de-clock as well. Also in Nvidia control panel did you adjust the physics setting to CPU, this should take the load being used for physics off the Graphics cards.