Since I have not found anything related to dual-channel memory compatibility with NUC motherboards, I feel encouraged to start this thread to hopefully get information from NUC owners who have picked a pair of identical memory sticks that has successfully enabled DC mode.
Please specify your equipment!
I am successfully using this 16GB (2x8GB) kit with my Intel Nuc D54250WYK:
Kingston HyperX Impact
16GB (8GB 1G x 64-Bit x 2 pcs.) DDR3L-1600
CL9 204-Pin SODIMM Kit