Here is my .conf file for 3X 290x.....bring down the tc if you get hw errors(22000?).
Play with the mem and engine speed as well if you get it running...I'm 1015/1500
Delete what you need to for 1X or 2X.

I added to giveaways in the previous post....200 THOR randomly through thread  

http://pastebin.com/gxKbPd80