Nvidia GeForce 700 Series’ flagship GTX 780 is confirmed to have GK 110 core with the same reference design as on the GTX Titan.
The marking on the core has the model ‘GK110-300-A1″. So far, multiple sources pointed that the card 863 core clock with 6GHz memory clock, 2304 CUDA cores , 192 TMUs and required 6+8 PCIe power connector. It can also be used for a 4 way SLI with dual link DVI, HDMI and DisplayPort outputs.
The press shots show that the reference card uses Samsung’s memory, followed by 6+2 power phase configuration.