Synaptic will allow you to install incompatible nVidia drivers. Since you did not state your DE, I will state that in LMDE Mate 64-bit, you can install the correct driver from the menu by System >> Preferences >> Device Driver Manager on my installation.
Another way to install the correct driver is by the simple CLI command:
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sudo apt-get install nvidia-current
LMDE Mate 64-bit, LM16 Mate 64-bit
Debian Xfce 64-bit, Xubuntu 13.10 64-bit, Xubuntu Trusty Tahr 64-bit, Antergos Xfce 64-bit, PCLinuxOS LXDE 64-bit