Nice! My auto config settings usually get set to K14x16, but I've found that 112x2 gives me the best results. With that 680 your hash rates seem to be right on the mark. If your temperatures are cool enough, you could look into getting a few more kh/s with overclocking. I believe this applies to all kepler cards, but the most important thing to keep in mind is that your gpu clock will begin to gradually decrease after 65 degrees celsius.

From some overclocking testing I've done with my cards, I've seen that a 50mhz change = roughly 10 kh/s difference.

There is a pretty good overclocking guide that you can find here if you are feeling brave enough http://www.overclock.net/t/1265110/the-gtx-670-overclocking-master-guide