Having taken the covers off the GeForce GTX 780 a week ago, Nvidia is ready to release their next part in the GeForce 700 series. Earlier rumors indicated that the GeForce GTX 770's specifications would be much like a GTX 680 on steroids, and as it turns out that's exactly what it is.
The GTX 770 features the fastest GDDR5 memory we have ever seen at 7GHz. Memory at that clock rate is good for a peak bandwidth of 224GB/s, 16% more than the GTX 680. Therefore, technically if you could overclock a GTX 680 well enough you could create a GTX 770.