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ThunderMine, Yep, this is obvious if you not first time buyer, this is from their cloud, i'm glad if i receive miner in working condition 
Did I miss something on their website for the product? It references a "final production run", not used cast offs from their own mining farm. One unit I received looks pretty good overall, the other looks like it's been running somewhere sitting on a dirt floor for several months. Neither appear to achieve a stable hash rate near the claimed spec. I'm lucky to get over 1TH out of either one although the GUI claims all the chips are fine.
Only running around 48 C on temps (seen 51 a few times briefly) in an ambient temperature of around 72 degrees F (that's fairly normal room temp for the metric minded), but with the suboptimal output, not surprising I guess. Fans at 3360 RPM at 48C on the dirty one. Seems like the fans could back down a bit. Other is slightly less and runs slightly hotter.
I got the impression from the reviews that they built a pretty good miner, but I'm getting a little different impression first hand with these two. I'd be willing to bet the fan on the dirty one fails pretty soon. The dirty fan is definitely louder than the other. I can hear it over my ASICMiner Prisma even, and that thing is loud. At least it achieves (exceeds most the time) its claimed spec for the noise it makes though. I'm way outside the -5% on both these units. Average hash after an hour, 998.88GH/s on the dirty one which seems to run slightly better than the other speed wise. I've tried different pools including AntPool with the same results. Has 1947 HW errors in an hour too.
How do I tell whether I have the latest firmware?
definitely something weird going on..
my was new, shiny, and unused.. unless they did a really good job of cleaning mine.
I went back and looked all all 4 of my new ones really closely, the ONLY wear and tear I could see is possibly during the QA burn in period, there's very light dust on the edge of the fan, like you'd expect after being run for a day or two at most.
The PCBs are all 100% clean, no hidden dust in any of the nooks and crannies, no dust inside any of the heatsinks.
I don't believe any of my 4 were used. I have two more arriving monday, I'll check them closely as well.
Mine has a visbile layer of dust on the controller board and much more than "light dust" on the fan. You can see the dirt on my fan from across the room.
