Correct. We did not. We did do 680s as well as a few of our other 6 series cards IIRC.
NVIDIA's direction on the cooler for the 690 was insane (good), so we didn't mess with it. We will have to see what the next series brings to find out if there will be another dual GPU solution and if we choose to put it to water (and no, I don't have any inside info at this time when or what the next GPU series will be announced).