I want to give big big thanks to Ocminer and all the other helpful users on this forum. 

I am wondering what motherboards people are using to build their rigs with, and how many gpus you are running off of one board.  I have an issue with an ASRock 970 Extreme 4 board where I can't get more than 3 opencl units recognized.  always returns 3 devices regardless of how I rearrange the cards.