Another update, I took advantage of Canaan’s flash sale and purchased ten on their 921’s including power supplies, controller and 4 auc’s. I have had some odd issues though. No matter what I do, these miners will not turn on. I have tried through my 250v pdu, my 220v pdu and directly connecting to the wall outlet and the same result every time. Controller and auc’s power up and light up, power supplies power up, but nothing on the miners themselves. I must say Canaans customer service is leaps and bounds better than its competitors because within minutes I was on a video chat with two techs and then had them teamview into my network. Suspicions are that in this last batch shipped out in the flash sale before discontinuation, they forgot to install firmware on the devices. My controller had no firmware installed, which makes me think this may be the case.

https://i.imgur.com/wP3pQpS.jpg