Name: GeForce GTX 680MX Mac Edition
This is an Apple subsystem. Please post the name of the Apple device which contains a GTX 680MX, instead of just posting the name of the GPU. (I think I've told this before, for other computer manufacturers)
Name: 27-Inch iMac, 3.20GHz [GeForce GTX 680MX]
Name: iMac 13,2
iMac 13,2 is the model name of that one.
We already know from the 10de:11a3 ID that it's a GeForce GTX 680MX, so please don't add that in the subsystem (GeForce name in subsystem only makes sense when the device ID doesn't make it clear already, it's for example very useful at 10de:1140).