GNU/Linux Elementary OS Installing GeForce Driver Guide
How to Install NVIDIA GeForce Graphics Driver on Elementary OS GNU/Linux desktop – Step by step Tutorial.
The GeForce Driver Elementary OS Setup is a breeze, requiring just a few straightforward Shell Commands to complete.
Most noteworthy: first try with the Recommended NVIDIA Driver Setup from Apt Elementary OS Repo, and then possibly the Generic for Linux.

GNU/Linux Elementary OS NVIDIA GeForce Driver Installation Guide