Antminer D9 vs Antminer S21 Hydro
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer D9 | Specification | Antminer S21 Hydro |
|---|---|---|
| 1,770.0 GH/s | Hashrate | 335.0 TH/s |
| 2,839 W | Power Consumption | 5,360 W |
| 1,604.0 J/TH | Efficiency | 16.0 J/TH |
| 75 dB | Noise Level | 50 dB |
| 16.1 kg | Weight | 15.8 kg |
| 9,687 BTU/hr | BTU Output | 18,288 BTU/hr |
| 36/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| X11 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer D9
Antminer S21 Hydro
Based on BTC price of $73,853 and current network difficulty as of Mar 17, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer S21 Hydro wins on 5 of 6 factors (efficiency, hashrate, home mining score, noise level, price-performance). The Antminer D9 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 S21 HydroScore: 44/100. 50 dB noise level.
Best for Efficiency
Antminer S21 Hydro16.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer D9 or Antminer S21 Hydro more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 Hydro is more profitable at $-2.14/day compared to $-6.76/day for the Antminer D9. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer D9 or Antminer S21 Hydro?
The Antminer S21 Hydro is quieter at 50 dB compared to the Antminer D9 at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer D9 or Antminer S21 Hydro?
The Antminer S21 Hydro scores 44/100 on our Home Mining Score (vs 36/100 for the Antminer D9). 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 D9 and Antminer S21 Hydro?
The Antminer D9 runs at 1,604.0 J/TH while the Antminer S21 Hydro runs at 16.0 J/TH — a difference of 1,588.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.