Recently, there was a rumor that Nvidia would be announcing its GTX 880 graphics card at Gamescom 2014. Now, it seems that might not be the case, and that instead we could be seeing a launch sometime mid-September. At least this is what VideoCardz.com has been told. The launch would be a paper launch, where the graphics card would officially be revealed. We won't necessarily get all the tech-specs of the card officially confirmed by Nvidia, but we certainly will get a fairly good idea of what Nvidia is gunning for with the GTX 880.
The rumored specifications are that the card will be based on a GM204-400 GPU. The model name for the reference board is PG401. Onboard we expect to find 4 GB of GDDR5 memory that will run over a 256-bit memory interface. This might sound like a rather narrow memory interface, but remember, the Maxwell architecture doesn't suffer as big a performance hit on narrower memory interfaces as Kepler does.
Pricing should sit between $400 and $450, with performance right between the GTX 780 and 780 Ti. Hopefully, there is truth to this expectation.
The cards are supposed to launch a few weeks after the mid-September paper launch. Note, this is still all a rumor, so sit tight.