In the dowload web page: http://developer.nvidia.com/object/cuda_3_…t_rc.html#Linux
you read “Developer Drivers for Linux (260.40)”, but in the case of 64-bit, you really download
the driver 260.24 version.
… a bug?
Is here the solution of … ?
CUDA Device Query (Runtime API) version (CUDART static linking)
cudaGetDeviceCount FAILED CUDA Driver and Runtime version may be mismatched.