VR Zone claims NVIDIA will introduce a GeForce GTX 570 graphics card in December. Additionally, the site also notes the Radeon HD 6950 and 6970 are now scheduled for December 13th.
A slightly watered-down version of the GF110, or rather chips that do not meet the GeForce GTX 580 spec, will be placed on the upcoming GeForce GTX 570. The GF110 chip on the GeForce GTX 570 will have one streaming multiprocessor disabled, bringing the total CUDA core count to 480 - the same as the outgoing GeForce GTX 480. Performance is said to be around the GTX 480's level, but with a TDP quite similar to the GTX 470. No further specifications are available, but we would expect 1280MB memory on the new card.