Though I'm close, I'm using 4 different TC's for each card, my setup will be of no use to anyone for 290x, or perhaps one of the 4 might help 1 of 4 people... who knows.
Ye many miners may have to increase system RAM, hoping I can squeeze by with 8GB and 3 GPU; gonna be close if so.
edit: think I'm at 0 HW's!! woot
yes, the 8GB with 4 GPU is my problem, I'm well aware, just trying to work around the limitation right now. I have 3 running without HW errors right now, can't pull in the 4th.