Hi Patrick,
Did you try installing Fedora packages that correspond to:
|sudo apt-get purge nvidia*
sudo apt-get purge bumblebee* primus
sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-352 nvidia-prime
sudo add-apt-repository -r ppa:bumblebee/stable
|
See web page
http://askubuntu.com/questions/658040/ubuntu-14-04-nvidia-drivers-for-gef...
There is also
http://www.geforce.com but they do not have 64 bit drivers.