dpkg -l | grep nvidia
ii  nvidia-331                                 331.113-0ubuntu0.0.4                  i386         NVIDIA binary driver - version 331.113
ii  nvidia-331-uvm                             331.113-0ubuntu0.0.4                  i386         NVIDIA Unified Memory kernel module
ii  nvidia-libopencl1-331                      331.113-0ubuntu0.0.4                  i386         NVIDIA OpenCL Driver and ICD Loader library
ii  nvidia-opencl-icd-331                      331.113-0ubuntu0.0.4                  i386         NVIDIA OpenCL ICD
ii  nvidia-prime                               0.6.2                                 i386         Tools to enable NVIDIA's Prime
ii  nvidia-settings                            331.20-0ubuntu8                       i386         Tool for configuring the NVIDIA graphics driver