What are /r/sbcmining's favorite Products & Services?

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I am using this one: https://smile.amazon.com/gp/product/B00IJ2J2K0/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1

Which is a double fan on a single usb power cable with adjustable speed. If you are doing a smaller stack you might get a single instead. I really like this fan though - search AC Infinity on Amazon and you should get some good results.

I wanted to get some hard numbers to compare a single large fan style setup versus the individual fan setup I have been using.

This test is using NanoPi Fire3 LTS boards and this fan from Amazon:

https://smile.amazon.com/gp/product/B00IJ2J2K0/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1

I tried several configurations and the picture is just a reference. For the first tier of boards that are closest to the fan there was some improvement in cooling (about 1-2 degrees celsius). I thought this was a pretty good result considering I stacked them pretty tightly in order to fit four boards.

The second tier boards understandably did not get cooled as well. On average they had temps of about 15 degrees hotter than the tier one boards which I thought it was a bit surprising to see such a large difference. If I go forward with a similar setup I will definitely only do 4 boards per fan.

The numbers:

Tier 1 boards: average temp of 63.5 degrees celsius

Tier 2 boards: average temp of 79 degrees celsius

Will buy this power supply: https://amzn.to/2OpgL5a has 10W/port what means at 5V you get 2A/port

Edit: will buy this article because the one above isn't compatible with my sockets... : https://www.amazon.de/Anker-PowerPort-Family-Sized-Ladeadapter-Technologie-Schwarz/dp/B00PTLSH9G/ref=mp_s_a_1_1?ie=UTF8&qid=1534254468&sr=8-1&pi=AC_SX236_SY340_FMwebp_QL65&keywords=usb+charger+6+port+60w