There are two GPU cards on the system: M2000 and C2075.
When I build lammps with sm_50, I can run the program on M2000. However, when I build with sm_21, neither M2000 not c2075 run the program. The error I get is
ERROR: GPU library not compiled for this accelerator (…/gpu_extra.h:40)
Last command: package gpu
Isn’t M2000 backward compatible?