The Nvidia GTX 690 has been spotted in the wild. This image was posted on INPAI.com.cn but the link to the origonal story is now dead.
The card is one massive PCB with both GPU's onboard. As with most dual GPU cards, each GPU is separate, having it's own VRM Zones and memory.
It looks as though they have switch from the lateral-flow fan to a lateral-flow blower. I'll post some more specs as soon as they are available.