Guys its been at least 2 out of 10 of bitmain that were used (much dust), and also overclocked!
Are they serious? How can they have warranty when they send them o'cked?
Support also sucks, sorry.
Bitmain, any comment on this

Check this guy:

People-Bitmain is using miners for own benefit by "checking" if they work. End of story. Why all miners before your own setup have credentials like:
pool-xxx.xxx.xxx
worker- anntminer 123Dont be surprised about any of this fact. Some miners are from 2014 batch and some coming still from 2013??? This means they was mining for them, why you think price is low and they can still deliver units? I stopped to complaint about dust and overcloked units. Whats the point?
This is 5 units on sale in UK if anyone interested from me:
https://bitcointalk.org/index.php?topic=560828.msg6117056#msg6117056All taxes paid and ready to ship.
Yeah right, they all mined on the same IP, I'm sure that worked well! A more likely explanation is those settings are already in the firmware image they use to flash the units just before they are shipped out.