A member of Expreview forums posted a picture of the new Kepler GK104-425 GPU, which will be used for NVIDIA’s GeForce GTX 770.
There are no visual changes to other variants — 400, 355, 335, 300, they all look the same. The real change should be hidden under the hood. Assuming that this is just a matured version of the GK104-400, then you should expect 1536 CUDA Cores, 128 TMUs and 32 ROPs. The processor is accompanied by 2 or 4GB memory (depending on the model), which is supported by 256-bit interface. In comparison to GTX 680, the new card will run at higher frequencies (1050 MHz+). It is unknown yet, if the GTX 770 will support GPU Boost 2.0, but if it does, then custom cooling solutions will definitely come in handy.
The GeForce GTX 770 is making use of 5+2 phase power design, with a TDP higher than GTX 680’s (drawn through 6+8pin power connectors). Card is equipped with two DVI’s, one HDMI and DisplayPort. I already know that ASUS is preparing an overclocked version with DirectCU cooler, which shouldn’t be surprising.