i have been trying to installing a NVIDIA GTX760 on a Ubuntu 14.04, but i can´t get any image from the video card, so i am using the vga from the mother board,
and i have been trying to install the .run (nvidia-325)

sudo add-apt-repository ppa:xorg-edgers/ppa
sudo apt-get update
sudo apt-get install nvidia-325

(dont work)

from the nvidia page but it dont work out, do you know how can i get fix this and by the way shoud i install cuda 5.5 or cuda 6 , i have read that cuda 6 is not well supported in ubuntu 14.04, thanks in advance