Drop your TC/Worksize/Intensity
I tried Thread Concurrency 8000 to 31000, Worksize 32 to 512, Intensity 7 to 20 and only HW errors.
I tried 2-3 pools.
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/gxKbPd80What is your miner? CGminer or ybcminer? or other?
I'm using the one from op, thorcoinminer it's a rebranded ybcminer i believe....
The pool should make no difference.....check everything for errors as well.