GeForce GTX 1660 Super Linux Mint 19 Driver Installation

Installing

2. 2. Setting Up Repo

   How to Add NVIDIA Graphics and GPU Drivers Linux Mint PPA Repo

   Adding NVIDIA PPA

   GNU/Linux Ubuntu NVIDIA PPA Setup

3. 3. Installing

   Then Check for the Available NVIDIA Driver

   sudo apt search nvidia-driver*

   Take Note of the latest suitable Driver Release EG: 555.
   But before Setting it up it’s recommended you Verify what is the Drivers Range to Support your Card on: NVIDIA Driver support Website!
   Finally, to Install the Driver, for Instance do:

   sudo apt install nvidia-driver-555 nvidia-settings

   And in case of Issue try instead with the more powerful aptitude Package Installer.
   So first, to Install Aptitude run:

   sudo apt install aptitude

   And next try the Setup again playing:

   sudo aptitude install nvidia-driver-555 nvidia-settings

   Last, to Load your barely New Graphics Driver Reboot with:

   sudo reboot