Reply To: Multi GPUs Calculation
Ok, this looks as if the wrong MPI version is selected for compilation. Likely you will get a compiler / linker error if you remove opempi-bin and libopenmpi-dev.
Does ompi_info --parsable -l 9 --all | grep mpi_built_with_cuda_support:value return true (as per the user guide)? Did you modify the PATH accordingly?
I would suggest to make sure that the correct MPI version is set and use the flags as provided by mpic++ -showme. (Or you can exactly follow the user guide / tech report).