Not trying to attack bitmain at all. I did a lot of research before buying, and they had the reviews I liked. As far as my troubleshooting, you sound like my buddy. He said I just got unlucky and got bum units. Me being the optimist was hoping it was because I was trying to be cheap on PSUs. As far as asking for advise after 1st one I've read the responses most have and figured that wouldn't do me any good. (just look at yours)