3. The last two things we need to do now are install an appropriate proprietary NVIDIA display driver for Ubuntu and install the CUDA 5 Toolkit. Depending on which driver you want to install; the The driver version needs to be at least 304.54 for in order to utilize CUDA Toolkit 5 in Linux. You can install the driver that comes with the CUDA 5 Toolkit package (which at the time of writing is 304.54), or install a newer driver from Ubuntu (namely experimental-310.) Both methods require differing additional work and will slightly change the way you install the CUDA Toolkit.