You can blacklist nouveau as described here:
I had to install the nvidia driver, today actually, by dropping the x session, running the installer I downloaded from nvidia, then starting x again. After that I blacklisted nouveau.
To get nvidia working I did the following:
Download your driver from nvidia -Official Drivers | NVIDIA
sudo init 3 - this kills the x server
cd /<.run file location> - navigate to the .run file
chmod 744 <filename> - enable execution
sudo ./<filename> run the installer
Follow the prompts from there, that worked for me.
Then, sudo init 5 - this restarts the x session.
Test with inxi -G to see which drivers are running on which devices. Highly recommend the inxi package actually.
This worked for me, but I am on much different hardware than you, so YMMV.