I installed the drivers with the help of AMD's page http://support.amd.com/en-us/kb-articles/Pages/AMDGPU-PRO-Install.aspx
So If I uninstall it, and install it again how will Ubuntu know the drivers are for both cards? Thx
It's been a while since the last time I mined with Ubuntu, but I'm pretty sure that by default drivers are installed for all compatible hardware. So if there's 2 cards in your system then it'll install the drivers for both of them. Just try it, what do you have to lose anyway?So If I uninstall it, and install it again how will Ubuntu know the drivers are for both cards? Thx
So I ended up doing exactly what you said, and it seems to be working just fine. My hash rate has doubled. Thanks for the simple instructions!
Do the standard uninstall first, then add the 2nd card to the PC and a standard install.