TPU came across rumors that NVIDIA's GeForce GTX 960 will feature the same memory bus as the GeForce GTX 970. A leaked shipping manifest reveals the GTX 960 offers a 256-bit memory bus with 4GB GDDR5 memory clocked at 6000MHz. The core clockspeed is said to be around 993MHz. Overall this looks like a pretty interesting mainstream gaming card.
The GeForce GTX 960, according to description given in the shipping manifest of the sample, features 4 GB of memory, with a full 256-bit wide memory interface. It also reveals clock speeds to be in the neighborhood of 993 MHz core, with 6.00 GHz memory (GDDR5-effective). It doesn't, however, confirm that the GTX 960 is based on a cut-down GM204 silicon. This could still be different chip, the so-called GM206, which succeeds the GK106.