Antminer S9i vs Canaan AvalonMiner 821
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S9i | Specification | Canaan AvalonMiner 821 |
|---|---|---|
| 14.0 TH/s | Hashrate | 11.5 TH/s |
| 1,320 W | Power Consumption | 1,200 W |
| 94.3 J/TH | Efficiency | 104.4 J/TH |
| 76 dB | Noise Level | — |
| 4.2 kg | Weight | 4,700.0 kg |
| 4,504 BTU/hr | BTU Output | 4,094 BTU/hr |
| 83/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Canaan |
Profitability Comparison
Antminer S9i
Canaan AvalonMiner 821
Based on BTC price of $77,547 and current network difficulty as of Apr 25, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer S9i wins on 4 of 5 factors (efficiency, hashrate, home mining score, noise level). The Canaan AvalonMiner 821 holds the edge in power consumption. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer S9iScore: 83/100. 76 dB noise level.
Best for Efficiency
Antminer S9i94.3 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S9i or Canaan AvalonMiner 821 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Canaan AvalonMiner 821 is more profitable at $-2.47/day compared to $-2.66/day for the Antminer S9i. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S9i or Canaan AvalonMiner 821?
The Antminer S9i is quieter at 76 dB compared to the Canaan AvalonMiner 821 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S9i or Canaan AvalonMiner 821?
The Antminer S9i scores 83/100 on our Home Mining Score (vs 31/100 for the Canaan AvalonMiner 821). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Antminer S9i and Canaan AvalonMiner 821?
The Antminer S9i runs at 94.3 J/TH while the Canaan AvalonMiner 821 runs at 104.4 J/TH — a difference of 10.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.