According to a report at Fudzilla.com, it appears that partners were given a green light on custom, or at least factory-overclocked GTX 780 and GTX 770 graphics cards shortly after the launch of a reference version. The reference versions should replace the existing GTX 680 and 670 graphics cards.
Since it has been revealed that the GTX 770 is pretty much a simple rebrand of the GTX 680 it is most likely that partners will use the existing GTX 680 PCBs and coolers to come up with a custom design. On the other hand, the GTX 780 will be a completely different beast and can be considered as a more reasonably priced GTX Titan, since it will be based on the same GK110 GPU.
The GTX 780 will, of course, end up to be much more faster than the GTX 680 while the GTX 770, a rebranded GTX 680, should end up just slightly faster than the GTX 680 since it only features higher clocks. Price wise, the GTX 780 will end up anywhere between €500 and €600 while the GTX 770 is expected to hit retail/e-tail shelves with a price tag similar to the GTX 680.
Both cards are expected in the second half of June or just after Computex show where most partners are expected to show their own SKUs, if Nvidia decided to give them a green-light, of course.
In any case, Computex 2013 should be quite interesting and we'll surely keep an eye on it.
Source:
Fudzilla.com.