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: These machines typically ran 24/7 in industrial farms before being resold. Common issues include dead hash boards , failing cooling fans, and high noise levels (roughly 76–85 dB, which is comparable to a loud vacuum cleaner). buy antminer s9 amazon

: Some users run them to support the Bitcoin network's security or use them as loud space heaters in the winter to offset home heating costs with the small amount of Bitcoin they produce. Conclusion Antminer S9 on Amazon on Amazon , you will almost exclusively find

: At a standard U.S. residential electricity rate of ~$0.15/kWh, the 1,300W power draw costs nearly $4.70 per day to run. This results in a net daily loss of over $4.00 . : Some users run them to support the

: To actually turn a profit, your electricity cost would need to be below $0.02/kWh , a rate virtually impossible to find for residential users without a massive solar array. 4. Who Should Buy an

: Community reviews for these listings are mixed. Some buyers on Reddit suggest looking for reputable sellers like Qio Tech , who have a track record of fulfilling orders correctly, while warning that many other listings can be "fishy".