I just finished building my own rig not too long ago and dual booted Win 10 preview and Mint 16. Unfortunately Nvidia hasn't done a great job making the drivers very easy to install. I found this guide on the mint forums for installing the proprietary drivers using the grub recovery terminal, which is marginally easier than ssh-ing using another machine like Logan had to http://youtu.be/0qiMuKbvFPU?t=45m49s. Anyways, hopefully someone out there will find this helpful.
343.36 driver install guide: http://forums.linuxmint.com/viewtopic.php?f=59&p=959842
GTX 970 343.36 driver: http://www.nvidia.com/download/driverResults.aspx/80145/en-us
GTX 980 343.36 driver: http://www.nvidia.com/download/driverResults.aspx/80145/en-us
-Stuartsoft