sli 2 diff brand gtx cards

Solution
YOu can run SLI from gpus of differrent models of the same gpu but both gpus will run like the lower clocked one. Also, you may have to use a flaxible sli bridge because there would be a difference in width between those two cards (you cannon use the new HB bridge but you can use two flexible bridges). Furthermore, it isn't the pretiest thing to look at, unlike two gpu's that look the same.
YOu can run SLI from gpus of differrent models of the same gpu but both gpus will run like the lower clocked one. Also, you may have to use a flaxible sli bridge because there would be a difference in width between those two cards (you cannon use the new HB bridge but you can use two flexible bridges). Furthermore, it isn't the pretiest thing to look at, unlike two gpu's that look the same.
 
Solution