Antminer S21+ vs Avalon A1566
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21+ | Specification | Avalon A1566 |
|---|---|---|
| 216.0 TH/s | Hashrate | 185.0 TH/s |
| 3,564 W | Power Consumption | 3,420 W |
| 16.5 J/TH | Efficiency | 18.5 J/TH |
| 75 dB | Noise Level | 75 dB |
| 15.0 kg | Weight | 14.9 kg |
| 12,160 BTU/hr | BTU Output | 11,669 BTU/hr |
| 30/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Canaan |
Profitability Comparison
Antminer S21+
Avalon A1566
Based on BTC price of $73,699 and current network difficulty as of Mar 17, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer S21+ wins on 2 of 5 factors (efficiency, hashrate). The Avalon A1566 holds the edge in power consumption and home mining score and price-performance. 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
Avalon A1566Score: 36/100. 75 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 Avalon A1566 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21+ is more profitable at $-1.65/day compared to $-2.30/day for the Avalon A1566. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S21+ or Avalon A1566?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Antminer S21+ or Avalon A1566?
The Avalon A1566 scores 36/100 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 Avalon A1566?
The Antminer S21+ runs at 16.5 J/TH while the Avalon A1566 runs at 18.5 J/TH — a difference of 2.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.