I have been trying to get the install to work using the instructions as I am fairly new to Ubuntu.  I read the aarticle below that says I can't install the newest drivers on 16.04.  What are my options.  Do I somehow downgrade to 14.04 or use what is default to Ubuntu?  Will that affect my performance hashing?  I am using 5x R9 280x.

http://askubuntu.com/questions/765616/amd-r9-280x-drivers-for-ubuntu-16-04

fglrx is no longer supported on 16.04. AMD discontinued support for its Linux driver, and it isn't compatible (you will break your installation if you attempt to install fglrx on 16.04).

For now, you have to stick with the open source drivers. AMD may be releasing a proprietary driver for Linux that works with 16.04, but it probably won't support very many cards.

Here's a comparison of how the default drivers on 16.04 compare to fglrx on 14.04, if you want to take a look:

http://www.phoronix.com/scan.php?page=article&item=ubuntu-1604-amd&num=1