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I'm totally new to crypto currency mining and I have a picture where there is a rack of computers mining cryptocurrencies (supposedly). I'd like to know what computers are those and maybe availability and pricing.
I tried to ask on meta about whether this question is suitable to Bitcoin SE, but I got a message saying that I need at least 5 points of reputation :(
This is the picture I'm talking about:

I can't see any cabling that would power these or connect them to a network, so I'm left wondering if they are really operating. – Highly Irregular – 2017-10-24T02:47:22.060