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Canaan Avalon 821 (11.5 TH/s)
Outdated · Canaan · Air-cooled · SHA-256
The Canaan Avalon 821 (11.5 TH/s) is a air-cooled SHA-256 bitcoin ASIC miner from Canaan released in Feb 2018. It hashes at 11.5 TH/s while drawing 1,200 W, an efficiency of 104.35 J/TH. It is more than five years old and no longer competitive; the figures below are kept for reference.
Canaan Avalon 821 profitability
As of Sep 17, 2026, hosted in Argentina at 6.0¢/kWh with 98.7% uptime. Bitcoin $77,356.
| Period | Bitcoin mined | Revenue | Electricity | Profit |
|---|---|---|---|---|
| Daily | 0.000006 BTC | $0.44 | $1.79 | -$1.36 |
| Weekly | 0.000039 BTC | $3.05 | $12.54 | -$9.49 |
| Monthly | 0.000171 BTC | $13.25 | $54.48 | -$41.22 |
| Yearly | 0.002056 BTC | $159.02 | $653.65 | -$494.62 |
Electricity per bitcoin mined: $317,963.
Where to host the Canaan Avalon 821
| Site | Cooling | Rate | Uptime | Cost per BTC | Profit per month | All-in per unit | Year 1 return |
|---|---|---|---|---|---|---|---|
| UAE | Immersion | 6.0¢ | 99.3% | $317,963 | -$41 | — | — |
| Nigeria | Air-cooled | 4.0¢ | 74.7% | $211,975 | -$17 | — | — |
| Argentina | Air-cooled | 6.0¢ | 98.7% | $317,963 | -$41 | — | — |
Canaan Avalon 821 specifications
| Specification | Value |
|---|---|
| Manufacturer | Canaan |
| Model | Canaan Avalon 821 |
| Release date | Feb 2018 |
| Algorithm | SHA-256 |
| Hashrate | 11.5 TH/s |
| Power consumption | 1200 W |
| Efficiency | 104.35 J/TH |
| Cooling | Air-cooled |
Canaan Avalon 821 FAQ
Can I buy the Canaan Avalon 821?
The Canaan Avalon 821 is outdated. Newer models make bitcoin far more cheaply.
Is the Canaan Avalon 821 (11.5 TH/s) profitable?
As of Sep 17, 2026, hosted in Argentina at 6.0¢/kWh, the Canaan Avalon 821 (11.5 TH/s) is calculated to lose $1.36 daily, $41.22 monthly and $494.62 yearly after electricity, at a bitcoin price of $77,356. It always changes with bitcoin's price and network difficulty.
What does it cost to mine one bitcoin with the Canaan Avalon 821?
Electricity to mine one bitcoin with the Canaan Avalon 821 costs about $317,963 in Argentina, and $317,963 in UAE and $211,975 in Nigeria. Bitcoin trades at $77,356, so every coin it mines is made above the price of buying one.
What is the hashrate and power consumption of the Canaan Avalon 821?
The Canaan Avalon 821 produces 11.5 TH/s of SHA-256 hashrate and consumes 1,200 W, giving an efficiency of 104.35 J/TH.
Is the Canaan Avalon 821 air-cooled or hydro-cooled?
The Canaan Avalon 821 is air-cooled with fans. In the UAE we run air-cooled machines in immersion tanks instead, which keeps them cool in desert heat.
Where can the Canaan Avalon 821 be hosted?
We can host the Canaan Avalon 821 in UAE (6.0¢/kWh, 99.3% uptime, immersion), Nigeria (4.0¢/kWh, 74.7% uptime) and Argentina (6.0¢/kWh, 98.7% uptime). The bitcoin it mines goes straight to your own wallet.
When was the Canaan Avalon 821 released?
Canaan announced the Canaan Avalon 821 in Feb 2018.