Report: NVIDIA GeForce GTX 560 in 2011, features 384 SP
It should come as no surprise that the GTX 560 will be a similar upgrade to GTX 460 as GTX 580 was to the GTX 480. Fudzilla reports that GTX 560 will be based on GF114, which is basically a GF104 with minor optimizations. All 8 SMs will be enabled, which means the mythical 384SP/64TMU/8PolyMorph card will finally materialize. In addition to the 8th SM, the GTX 560 will also feature higher clock speeds which ultimately will lead to a performance increase of 15% to 20% over the reference GTX 460.
While this sounds like a decent increase, the heavily OC GTX 460 versions like the EVGA GTX 460 FTW can already boast similar gains over the reference GTX 460. It is likely, then, that the GTX 560 will also have a plethora of confusing OC editions, though the consumer will surely prefer a more streamlined product line.
The GTX 460 continues to be an excellent product for its price, further boosted by questionable supply and rising prices for the Radeon HD 6800 series. On the long term, however, the Radeon HD 6800 series has much more price flexibility thanks to a much smaller die and cost cutting methods such as compatibility with Cypress package and PCB. The GTX 560 might end up outperforming the Radeon HD 6870 and maybe even play in a higher price range.
The release date is mentioned to be a vague "Early 2011"