I've gone ahead and added additonal PPA's to get more recent versions of the Nividia driver.
http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu
which gives me version 375.20
Is there anything wrong with getting more recent drivers this way?
The default PPA included with my ubuntu-mate install
http://ppa.launchpad.net/nemh/systemback/ubuntu
had a much older version.