of China-based firm Canaan Creative, was amongst the first firms. The AUC3 controller costs around 80 (60) and can be connected to others to form larger clusters. Top image credit: Wikimedia Commons. Power usage: 1,320W, hash power:.5 TH/s, daily profit:.00179041 BTC, reputable manufacturer, extremely energy-efficient. Since everyone is jumping on the mining bandwagon, these devices can be expensive and difficult to buy. Coinwarz before ordering to estimate your return in BTC. Just as with its predecessor, you need to purchase a PSU separately which should cost around 200 (150).
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If the unit does come with a PSU, make sure it's a good quality effort for maximum energy efficiency, such as Bitmain's own AWP3 power supply which also works with the. Antminer S7, a potentially canny investment, but tread carefully. When the device was announced, Avalon offered the device for sale in bulk quantities, and since it's currently out of stock, the listed price above might be different. Even with a high-end PSU, the S7 is still not as energy-efficient as the S9 on average it consumes.25 Joules of power per Gigahash. As the hash rate is also lower than that of the S9, your decision on whether to choose the AvalonMiner 821 will probably revolve around price considerations. The S9 is over twice as efficient, requiring less than.1.
The 821 also has a power efficiency.109 Joules per Gigahash, which is about 10 less than the Antminer S9 (at just under.098). Since the S9 arrived, many miners have upgraded, flooding the market with relatively cheap used S7 devices. You will also need to purchase a PSU separately for around 150 (110).