The words “bitcoin mining” and “good for the environment” don’t exactly belong in the same sentence. However, Samsung unveiled an impressive demonstration of what an upcycling initiative can do using old Galaxy S5 phones. With 40 old Galaxy S5 arranged in a tower, Samsung demonstrates the usefulness of old devices that would otherwise just be in storage.
Although the raw has rate of the phone is significantly less than an Intel i7-2600 desktop PC (20,000 Mhash/sec vs 2600), it is significantly better when factoring in power efficiency. More than three times as much with 211 Khash/Watt vs 650 with the Galaxy S5. The impressive part is that those numbers from from eight Galaxy S5 phones versus one i7-2600 desktop. Samsung did not reveal directly how good at mining the 40-phone setup is, but users can extrapolate from the eight phones on the chart.
Obviously, it requires some engineering to pull this off. Users cannot just start building their own mining rig out of old phones since it requires a special operating system to use properly. This one is running with an OS specifically developed by Samsung for this demo.
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