Two of my devices have already been repaired. The bearings on the other 3 are already whistling. I don't think this is a product with a very long lifespan.
The main problem is the heat. Keep them cool with usb fans. Mine are working like a charm.
You are absolutely right on this one.
The cooler you can run them, the longer they will last!
But if you want to use them as small heaters, in my opinion they won't last very long...
This is what I do to keep them cool:I got my 1st Nano 3 in early August last year and setting it to
Low power mode I noticed the temp reached
80c! And this was inside the house during the Winter here in Australia. So the first thing I did was remove both front and back panels. Okay so then the temp only went to 65c after that. There's also a thin fixed plastic black mesh filter tacked on the inside of the exhaust vent which I also removed with a small flat head screwdriver. That dropped the temp by another 3 or 4c.
Unfortunately without manual control of the internal fans (mine are programmed to run at 25% only), I couldn't get the temp any lower. So the last thing I did, and this had the best result over all. I cut up an old metal coat hanger and threaded it through 2 mounting holes of a 120mm high static pressure PC fan and fashioned it as a stand so the fan sits upright quite firmly. I placed that PC fan directly behind the Nano 3 (pushed right up against it at about 50% of max speed using a cheap 12v fan controller from AliExpress). That dropped the temperature down another 22c!
I bought another 2 more Nano 3 miners about 4 months ago and used the same procedure above and all 3 of my Nanos have been running flawlessly. However, I rarely run them on
High for very long. My main goal is to have them mining at a speed which will keep them at
60c or lower for longevity. I have my Nanos setup on a shelf in my garage and their temperatures will reach 25c above ambient on
Low setting. So in the Winter when it's 10c in the garage, the Nanos will be at about 35c on the
Low setting. If I crank it to
Med setting they will hit the high 40s to low 50s celsius (with the ambient around 10c). Finally setting to
High and we're approaching high 60s to low 70s celsius (still with the ambient around 10c). So during next Winter (a little earlier and a little later so about 6 months worth), I'll have them set to
Med setting probably all season.
But now it's summertime here and the ambient temp in my garage has reached 35+ celsius many times already so the Nanos never go above the
Low setting. When the Nanos temp goes a few degrees over 60c, I turn them off until night time when it's a little cooler again.
My Alternate power source:I use this Power Supply: (which has plenty of power to spare with 3 Nanos on High setting)
https://www.aliexpress.com/item/1005007293375122.htmlAnd 3 of these Fast Charging Modules:
https://www.aliexpress.com/item/1005007815956220.htmlPersonally I would only use the power bricks that come with them on the Low setting and maybe on Med setting in the cooler months...
