Soon NVIDIA will introduce the first graphics cards based on its 28nm GK106 GPU. The GeForce GTX 660 is anticipated to be released next week, and according to TPU two more GK106 video cards are in the works as well. The GeForce GTX 660 is based on the GK106-400, while a GK106-250 will be used for the GeForce GTX 655 and a GK106-200 chip for the GeForce GTX 650 Ti.
The GK106-250, carrying a working title GeForce GTX 655, could have one of the five SMX units of the GK106 disabled, resulting in a CUDA core count of 768. According to the document, it features a 192-bit wide GDDR5 memory interface, holding 2 GB of memory, much like the GTX 660. The GK106-200, on the other hand, with a working title GeForce GTX 650 Ti, could feature just three of the five SMX units on the GK106 silicon, making up 576 CUDA cores. According to the document, it features 2 GB of GDDR5 memory across a 128-bit wide memory interface, much like the GK107-based GTX 650. The two SKUs could help NVIDIA seal gaps in its mainstream desktop GPU lineup.