*Facepalm*
And?
First, NVidia said Pascal is Maxwell, but with support for HPC. See slide about Pascal.
Second, Maxwell 1.0 (GTX 750Ti, no DX12 FL 12.1 support) for CUDA 6.0 (compute capability 5.0) and Maxwell 2.0 (with FL 12.1 support) for CUDA 6.5/7.0 (compute capability 5.2) -- different...