Ubuntu 16.04: nvidia drivers for GeForce GTX 960M

Some time ago I asked a similar question about Ubuntu 14.04.

Now I just installed Ubuntu 16.04, hoping that with the new version the graphic card was recognized effortless. Sadly I still have a similar issue.

I have an Asus N551JW laptop with these two graphic cards:

• Integrated Intel® HD Graphics 4600


• NVIDIA® GeForce® GTX 960M 2G GDDR5

By default, Ubuntu recognizes the Intel graphic card but not the NVIDIA one.

I tried installing NVIDIA's drivers from System Settings > Software & Updates > Additional Software:

But when I restart the system I'm not longer able to access. I see the login screen but when I insert the password I'm brought back to the login screen again.

In the question I linked above there is a solution working for Ubuntu 14.04, can I use the same procedure also on Ubuntu 16.04? Or is there a new way to correctly install NVIDIA drivers?

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EDIT

I tried as described in these other answers:

Graphics issues after/while installing Ubuntu 16.04/16.10 with NVIDIA graphics

and also as suggested by @Amias Channer.

I installed nvidia-364 with:

sudo apt-get install nvidia-364

The installation asked me to disable Secure Boot for an incompatibility problem and I accepted to disable it.

I restarted and the login worked good, without problems.

In System Settings > Software & Updates > Additional Software now I see this:

But I still see "Intel® Haswell Mobile" in System > Details (as in the first image above).

What should I do now? How can I enable the NVIDIA graphic card?