Apparently, there are two models of GTX 660 Ti, which differ in memory bus width and CUDA cores count. The one, which specifications were leaked few days ago, has 1344 CUDA cores and 192-bit interface. However, this model cannot beat the Radeon HD 7870, so NVIDIA came up with a new version with 256-bit instead, but also a castrated amount of cores Ė 1152.
The leaker says that this is a non-public version of the GTX 660 Ti, which is equipped with two 6-pin power connectors, while the 192-bit version would have only one. Card has a clocks of 980/1123/6000 MHz for base, boost and effective memory respectively. According to the source, card can reach a score of 2700 points in 3DMark11 Extreme Preset. Thatís a score of Radeon HD 7970. What is more, itís only 8% worse than GTX 670. Card can easily be overclocked to 1.2 GHz, just like other GK104 GPUs. Card is a dual-slot, short PCB model with two DVIís, DP and a HDMI output.