I've fiddled with Nvidia cards in the past but not that particular one. My best advice is to go into the Mint Software Manager (Menu-Software Manager) and type "NVidia in the searchbox. Install the package "settings" and the one "current" and see what you come up with.
Hope this helps.
HP a6619f, 4GB ram, 500 GB HDD, Nvidia GeForce 930 GS
Mint 13 Cinnamon 64