I would advise no one preordering this miner.  StrongU is doing terrible in delivering to customers this year.  I as well as many others are STILL waiting for 1st batch July delivery from the U6, and no one I know has heard anything about shipments from original U8.  Yet.. they are now taking orders for a "NEW" improved model of the u8 already.  What a joke..  If anyone has gotten a u6 or u8 from StrongU can we please post here?  I repeat again, I advise anyone against preordering this new model as no models from the orders they took in spring have shipped yet.