Apparently the thread on Chinese forums, which included GeForce GTX 780 and GTX 770 photos was removed. It’s a real shame, because it could provided more leaks. Anyway, here’s what I found on Chinese website.
The slide I found shows the ‘enthusiast roadmap’ including both Kepler and Kepler Refresh GPUs. You can clearly see which cards will the new GeForce 700 models replace. The GeForce GTX 780 packs GK110-300 GPU (that’s new, TITAN has GK110-400), while the GeForce GTX 770 features GK104-425. The third graphics card, which would be slower than GTX 670 has the GK104-225 silicon, and because no model name was included I presume that NVIDIA is still wondering how to name it (probably it will end up with the GTX 760 Ti anyway). There are also small footnotes on the chart: 5/23, 5/E and 6/M. I believe these are the launch dates: May 23rd, End of May, Middle of June. The Chinese guy who posted this chart also confirmed both launch dates for GTX 780 and GTX 770.
The other interesting part are obviously the memory configurations. The GTX 780 would make use of 3GB GDDR5 memory, while the GTX 770 could be equipped with 2GB, just as the GTX 680 is.
As for the questions you might ask. No, I didn’t make this chart, and no, I have not added anything besides the watermarks and some blurriness. I think this picture looks quite legit (considering how many fakes I’ve seen). The color-scheme and the fonts are correct. However, as always, treat it with a grain of salt. Maybe this is indeed a real chart from NVIDIA, but it may be old, so for instance, the launch dates could be different.
On the other hand, it’s worth noting that few large GPU databases changed the specs of GeForce GTX 770 to GK110. There are many people who actually believe that the GTX 780 and GTX 770 are in fact featuring the same processor, only in different iteration.
Stay tuned for more leaks!