This benchmark here shows that GTX 670 is better in some conditions. GTX 670 supports Cuda 3, while GTX 750 Ti supports CUDA 5 but GTX 960 supports Cuda 5.2. However, I have no experience how much this difference could be in reliability, accuracy and computation speed. I would like to understand differences between Cuda 5 and 5.2 in Matlab computation, and this way, understand which GTX to choose.
How can you decide which GPU is better for scientific computation in Matlab?