Freddyfarnsworth is correct these are the best quality hub that I have put my hands on. I have had 10-15 different hubs and for bitfury sticks none of them work as well as these do. I am running 16 ice 'nano' fury sticks clocks of 54 and 55 on one of these. they just work.
I did 16 at freq 54or 55 on this hub. no power errors
This hub does only 7 of 10 at 54 with an occasional power error
the classic sign of a lack of power on a nano fury overclock is this line of type in bfg miner.
NFY 0 : Frequency drop over 50% detected reinitializing .
with this repeating a lot you need to drop your oc. well I can't get all 55 over clocks with this hub but I get 16 working 10 at 55 over clock and 6 at 54 overclock zero power warnings.
the 16 sticks are doing 2.5-2.6 each so 16 sticks get 41gh and use 55 watts k-a-watt meter.
I purchased one from razorfishsl on this site. I liked it so much I bid on an ebay auction for a second one and I now have a second one coming in. I posted here because the ebay auction was done by klintay. I hope to get it soon. the last one took 8 days was held in customs four days or would have been quicker.
These are so much better then any hub I have used. especially better with bitfury chips.