NVIDIA seems to complete its Kepler GPU lineup by announcing two more mid-range cards in September – GTX 660 and GTX 650.
The cards which were revealed long ago would be featuring the GK104 and GK107 core respectively. GeForce GTX 650 which runs on the GK107 core has 384 Cuda cores with a base clock speed of 1058MHz and a 1GB GDDR5 (128-bit) memory running at 5000MHz. The GPU would cost $129-$149 at launch.
Another card known as the GTX 660 (Non-Ti) would be announced on the same date though its unconfirmed whether the specifications would be similar to the recently launch OEM version of the GTX 660 or differ from that variant, it is also said that the GTX 660 could be based off the GK106 core and possible PCB shot was detailed here. Guess we will have to wait for final details.
September 6th is the announcement day while launch day is said to be 22nd September, Cards would be available in Factory overclocked versions too at launch.