Antminer S21 Hydro vs Avalon A1446
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 Hydro | Specification | Avalon A1446 |
|---|---|---|
| 335.0 TH/s | Taux de hachage | 135.0 TH/s |
| 5,360 W | Consommation électrique | 3,310 W |
| 16.0 J/TH | Efficiency | 24.5 J/TH |
| 50 dB | Niveau de bruit | 75 dB |
| 15.8 kg | Weight | 12.8 kg |
| 18,288 BTU/hr | BTU Output | 11,294 BTU/hr |
| 44/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Canaan |
Profitability Comparison
Antminer S21 Hydro
Avalon A1446
Based on BTC price of $78,175 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Antminer S21 Hydro edges it: 4 of 6 factors go its way (efficacité, hashrate, score de minage domestique, niveau sonore). Its biggest concrete edge: 148% more hashrate (335 vs 135 TH/s). The Avalon A1446 holds the edge in consommation électrique and rapport qualité-prix. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Antminer S21 Hydro and Avalon A1446 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer S21 Hydro 148% more hashrate (335 vs 135 TH/s)
- Avalon A1446 38% better power draw (5,360 vs 3,310 W)
- Antminer S21 Hydro 35% better efficacité (16.0 vs 24.5 J/TH)
- Antminer S21 Hydro 33% better noise (50.0 vs 75.0 dB)
- Avalon A1446 19% better weight (15.8 vs 12.8 kg)
- Antminer S21 Hydro 62% more heat output (18,288 vs 11,294 BTU/hr)
- Antminer S21 Hydro 22% more score de minage domestique (44.0 vs 36.0)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Antminer S21 Hydro | Metric | Avalon A1446 |
|---|---|---|
| $9,500 | Upfront cost (MSRP) | $3,200 |
| -$0.81 | Daily net profit | -$3.09 |
| -$9,797 | Net after 1 year | -$4,327 |
| -$10,093 | Net after 2 years | -$5,454 |
| -$10,390 | Net after 3 years | -$6,581 |
| Does not pay back at current rates (negative daily profit) | Payback period | Does not pay back at current rates (negative daily profit) |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
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 S21 Hydro or Avalon A1446 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 Hydro is more profitable at $-0.81/day compared to $-3.09/day for the Avalon A1446. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Antminer S21 Hydro vs Avalon A1446: which runs at a lower noise level?
The Antminer S21 Hydro is quieter at 50 dB compared to the Avalon A1446 at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S21 Hydro or Avalon A1446?
The Antminer S21 Hydro scores 44/100 on our Home Mining Score (vs 36/100 for the Avalon A1446). 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 Hydro and Avalon A1446?
The Antminer S21 Hydro runs at 16.0 J/TH while the Avalon A1446 runs at 24.5 J/TH — a difference of 8.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 35% better efficacité (16.0 vs 24.5 J/TH).