Ubuntu 14.04 – NVIDIA Proprietary Drivers

For better graphics performance, you may want to install NVIDIA proprietary driver instead of the open-source driver in Ubuntu Desktop.

xorg-edgers PPA provides the latest Nvidia drivers available for Ubuntu 14.04 LTS

sudo add-apt-repository ppa:xorg-edgers/ppa

sudo apt-get update

sudo apt-get install nvidia-340

Replace nvidia-340 with nvidia-343 or nvidia-346 if need