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
Okay. I'm now at 56KH/s for each 280x accepting shares. Averaging 50 WU each,
But I got 1-2 HW errors on some and 0 on some others. Not perfect but close!
My 4 x 280x rigs only have 4GB RAM. I just had to raise the swap file to 32768.
Still tweaking....