Well, we've been saying that for a while now. But loose lips from an employee over at Overclockers in the UK claim that NVIDIA's GeForce 980 and GeForce GTX 970 reference cards will feature 4GB GDDR5 memory. SKUs with custom coolers and 8GB GDDR5 memory will follow at a later date and claims the 980 will be faster than the GeForce GTX 780.
According to OCUK the GTX 970 and GTX 980 with 8GB models are expected somewhere between November and December. They did not comment on GM204 performance, but did mention that GTX 980 replaces GTX 780, not GTX 780 Ti (ooh shocking news)
980 / 970 4GB reference cards with 8GB coming at a later date with custom coolers. Can’t say any more but don’t expect a huge leap in performance over current single GPU stuff.
They replace 780, not 780Ti.
Performance wise, my lips are sealed on how it compares to 780Ti, but of course 980 is quicker than 780 for sure!