1.95t/h, I have another one like this with one 6 boards going, waiting on other beaglebone, since knc has been fucking me around for a week waiting to rma it, I said fuck it yesterday and ordered a beaglebone black for it, since the bottom part works.
Looks great! Are those the standard heatsinks? I haven't actually taken mine out of their ovens... er, I mean cases so I haven't had a good look. The heatsinks sure are skinny compared to i30s. But I can't say the i30s run much cooler than the stock HSFs even though I have my second batch units bolted down, outside of their cases and with the correct amount of TIM properly applied. These things just run super hot I guess.
http://www.ncix.com/detail/cooler-master-hyper-t4-heatpipe-86-79515.htm
I bought 12 of these, alittle wider then the supplied heatsinks, not quite as wide as board but close.
...came with alittle bit of thermal paste too