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Canaan Avalon 821 – Bitcoin Miner 11.5 TH/S – SECOND HAND


943 in stock



943 in stock

110V 220V

Model AvalonMiner 821 from Canaan mining SHA-256 algorithmwith a maximum hashrate of 11.5Th/s for a power consumption of 1200W.

The Bitech Mining Service


Indications before purchase

  • Please never forget that regardless of the current performance of miners, mining remains a risky activity.
  • Like any type of investment, never invest more than you can afford to lose.
  • Before ordering, please read carefully our Shipping and Payment Policy and our Warranty and Refund Policy.
  • If you are a beginner in mining, please read our beginner’s guide.



Currencies accepted €, $, £, Ethereum, Bitcoin, Bitcoin Cash, Litecoin, Ripple.
Method of payment: Bank transfer, Credit Card, Coinbase Commerce (Cryptos).


Delivery worldwide by DHL.
Delivery with signature required.


The bitech team will be happy to assist you with the handling of your equipment by customer support or teamviewer.

All our support ressources are available to this url : support.bitech-mining.com

If you have any questions, please do not hesitate to consult the FAQ or submit a support ticket here : https://support.bitech-mining.com/hc/en-us/requests/new

Bitech is a shop of enthusiasts of crypto-currencies with a team that has been mining for nearly 4 years. We offer you the best Mining Rigs currently on the market. These machines are the same as the ones we use for our Cloud Mining platform. Our Mining Rigs are carefully built in France.

Training is given during the exchange and occasional assistance is offered if necessary. And we support you in the use of your equipment.


Our wholesale service allows you to benefit from regressive prices on large purchase volumes. These regressive prices are also available for hosting requests on a large number of miners.

In addition, our consulting and audit branch can be consulted to help you build your farm and answer all your questions about the electrical cost, cooling of the miners and their selection.

For any request of this kind do not hesitate to contact us by the commercial contact form here.

Weight 19.5 kg
ModelAvalonMiner 821
Also known asAvalon A8
ReleaseFebruary 2018
Size150 x 136 x 370mm
Chip boards4
Chip nameA3210
Chip size16nm
Chip count104
Noise level65db
Wires8 * 6pin
Voltage12 – 12.6V
InterfaceAUC3 – RJ45
Temperature5 – 30 °C

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