sudo apt-get -t wheezy-backports install linux-image-3.14-0.bpo.1-amd64 linux-headers-3.14-0.bpo.1-amd64
installed fine and rebooted the machine then installed the nvidia driver using:
sudo apt-get -t wheezy-backports nvidia-driver
Then created a Xorg config file:
mkdir /etc/X11/xorg.conf.d
echo -e 'Section "Device"\n\tIdentifier "My GPU"\n\tDriver "nvidia"\nEndSection' > /etc/X11/xorg.conf.d/20-nvidia.conf
rebooted again, and instead of KDM loading, I'm at the tty1 terminal.
If i do a startx i see this error :
ERROR: could not insert 'nvidia_current': Unkown symbol in module, or unknown parameter (see dmesg)