Ok, found a few minutes to look closer... I think I found the problem. I am really glad I put some scrap 10ga steel underneath these miners. This was the board facing down and it was running only 220MHz.
impressive>
I am going to use 2 fans and these
http://www.amazon.com/gp/product/B00008DHPC/ref=oh_aui_detailpage_o09_s01?ie=UTF8&psc=1
back in the day a 40 gridseed orb rack
