Nvidia drivers on Ubuntu 18.04 USB?

Solution 1:

Checking my answer, I see that my experience was a little out of date,

I now see that Nvidia is smart enough to check if there is a Nvidia graphics card present before loading the driver.

Have not checked with an AMD computer yet.

Alternatively the drive is fairly large, you can dual boot the same OS, but only install Nvidia drivers on one of the installs.

You can choose which install to boot depending on the computers graphics card.

You can share a /home partition between both OS so the only difference in experience between installs is the graphics quality.