deb http://ftp.de.debian.org/debian/ unstable main non-free contrib
2 deb-src http://ftp.de.debian.org/debian/ unstable main non-free contrib


apt-get update

apt-get install module-assistant nvidia-kernel-common
apt-get install nvidia-glx

module-assistant auto-install nvidia
depmod -a
modprobe nvidia

apt-get install  nvidia-xconfig

nvidia-xconfi

reboot

y listo