Hold up a freaking second...this directly contradicts the other rumour
Other reports suggest that the upcoming GeForce Titan will also not be called the GeForce GTX 780, nor will it take a GTX 600 series name. It will simply be called the GeForce Titan, likely inspired by the by the Cray Titan supercomputer, which houses nearly 19 thousand Nvidia Tesla K20X cards.
http://www.tomshardware.com/news/GeForce-Titan-GK110-GTX690,20797.html
I can see the GTX branding on the screenshot. And to add insult to injury, this moronic Chinese site called it a GTX 780 Ti. Class A bullshit right there. Even if the Titan had all 2880 cores/15 SMX units enabled, it cannot possibly beat a GTX 690 on paper (or carry a mid-range series name). The only way it could even come close would have to be at some ridiculously VRAM-intensive resolution, like 3840x2160 or higher and even then it would be a struggle. Don't believe a word of this shit.
Oh and it won't have 6GB of VRAM. Not a chance in hell of that happening. If we take a look at Nvidia's timeline (reference designs only, 3rd party non-reference designs with extra VRAM are NOT included in this comparison)
7000 to 8000 series (512MB to 768MB) = 50% more VRAM
8000 to 200 series (768MB to 1024MB) = 33% more VRAM
200 to 400 series (1024MB to 1536MB) = 50% more VRAM
400 to 600 series (1536MB to 2048MB) = 33% more VRAM
as you can see, they follow the same pattern. Since the 700 series is essentially a resale of the same architecture, the best you can expect is 3GB of VRAM. Since this is their king of the hill halo card just like their GTX 690, you will not see 3rd party re-designs with double the VRAM since Nvidia will not allow it. Oh and since Nvidia's partners will still have loads of GTX 690s to get rid of, and the Titan will be priced under the 690, therefore the Titan will never beat the GTX 690, at least not in gaming.
This whole story reeks of horse shit. 85% of performance of a GTX 690 sounds about right, and that's the best anyone should expect.