Antminer S21+ vs Canaan Avalon A1566I
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21+ | Specification | Canaan Avalon A1566I |
|---|---|---|
| 216.0 TH/s | Hashrate | 249.0 TH/s |
| 3,564 W | Power Consumption | 4,500 W |
| 16.5 J/TH | Efficiency | 18.1 J/TH |
| 75 dB | Noise Level | 50 dB |
| 15.0 kg | Weight | 11.3 kg |
| 12,160 BTU/hr | BTU Output | 15,354 BTU/hr |
| 30/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Canaan |
Profitability Comparison
Antminer S21+
Canaan Avalon A1566I
Based on BTC price of $66,293 and current network difficulty as of Mar 28, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Canaan Avalon A1566I wins on 4 of 6 factors (hashrate, home mining score, noise level, price-performance). The Antminer S21+ holds the edge in efficiency and 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
Canaan Avalon A1566IScore: 44/100. 50 dB noise level.
Best for Efficiency
Antminer S21+16.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S21+ or Canaan Avalon A1566I more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21+ is more profitable at $-1.83/day compared to $-3.04/day for the Canaan Avalon A1566I. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S21+ or Canaan Avalon A1566I?
The Canaan Avalon A1566I is quieter at 50 dB compared to the Antminer S21+ at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S21+ or Canaan Avalon A1566I?
The Canaan Avalon A1566I scores 44/100 on our Home Mining Score (vs 30/100 for the Antminer S21+). 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 S21+ and Canaan Avalon A1566I?
The Antminer S21+ runs at 16.5 J/TH while the Canaan Avalon A1566I runs at 18.1 J/TH — a difference of 1.6 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.