dpkg -l | grep nvidia
ii  bumblebee-nvidia                                            3.2.1-5                                           i386         NVIDIA Optimus support using the proprietary NVIDIA driver
pc  nvidia-331                                                  331.89-0ubuntu5                                   i386         NVIDIA binary driver - version 331.89
ii  nvidia-343                                                  343.22-0ubuntu1~xedgers14.10.1                    i386         NVIDIA binary driver - version 343.22
ii  nvidia-343-uvm                                              343.22-0ubuntu1~xedgers14.10.1                    i386         NVIDIA Unified Memory kernel module
ii  nvidia-common                                               1:0.2.98.3                                        i386         transitional package for ubuntu-drivers-common
ii  nvidia-opencl-icd-343                                       343.22-0ubuntu1~xedgers14.10.1                    i386         NVIDIA OpenCL ICD
ii  nvidia-prime                                                0.6.6                                             i386         Tools to enable NVIDIA's Prime
ii  nvidia-settings                                             331.20-0ubuntu8                                   i386         Tool for configuring the NVIDIA graphics driver