1) There's no consistency with all the 4 separate Batch 9 orders I received, except 1 thing. They are all used for at least a few weeks if not much longer for sure. This recent batch is probably the worst. They didn't even bother cleaning the side and connectors,etc so it's even more obvious. QA is what they will call it, I'm sure. How much effort is it really to clean the machine a bit so the customer can at least pretend to think they got new machines.
2) FANs - Manual settings for the FANs are not necessary the same for the same level ie 60%. So when you hear people recommend you to keep it at 60% in case of internet outage, do check what the RPM is and what temperature maximum you want to be at and set it that per S7 rather than a generic value like 60. I have many set at 50 while others set at 80% to be at the same level.
3) Batch 8 / 9. Some will have the extra connectors for FAN and Hashboards, many will not. Last batch 9 order they all had extra connectors. This order, none of them have it. See picture.
Due to the amount of noise it makes I underclocked it's frequency to 400. Getting 3TH at that rate. Whenever I find a better place to keep it running I'll up the frequency a bit. There's no way that I'll be sleeping with it in my room.