Antminer E9 Pro vs Antminer S21 Hydro
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer E9 Pro | Specification | Antminer S21 Hydro |
|---|---|---|
| 3,680.0 MH/s | Taux de hachage | 335.0 TH/s |
| 2,200 W | Consommation électrique | 5,360 W |
| 597,826.1 J/TH | Efficiency | 16.0 J/TH |
| 75 dB | Niveau de bruit | 50 dB |
| 14.2 kg | Weight | 15.8 kg |
| 7,506 BTU/hr | BTU Output | 18,288 BTU/hr |
| 40/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| EtHash | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer E9 Pro
Antminer S21 Hydro
Based on BTC price of $78,179 and current network difficulty as of May 17, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Antminer S21 Hydro comes out ahead — it takes 5 of 6 (efficacité, hashrate, score de minage domestique, niveau sonore, rapport qualité-prix). The standout gap is 9103161% more hashrate (0.0 vs 335.0 TH/s) in the Antminer S21 Hydro's favour. The Antminer E9 Pro holds the edge in consommation électrique. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Here is every spec where the Antminer E9 Pro and Antminer S21 Hydro actually differ, with the gap quantified:
- Antminer S21 Hydro 9103161% more hashrate (0.0 vs 335.0 TH/s)
- Antminer E9 Pro 59% better power draw (2,200 vs 5,360 W)
- Antminer S21 Hydro 100% better efficacité (597,826.1 vs 16.0 J/TH)
- Antminer S21 Hydro 33% better noise (75.0 vs 50.0 dB)
- Antminer E9 Pro 10% better weight (14.2 vs 15.8 kg)
- Antminer S21 Hydro 144% more heat output (7,506 vs 18,288 BTU/hr)
- Antminer S21 Hydro 10% more score de minage domestique (40.0 vs 44.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Antminer E9 Pro | Metric | Antminer S21 Hydro |
|---|---|---|
| $3,000 | Upfront cost (MSRP) | $9,500 |
| -$5.28 | Daily net profit | -$0.81 |
| -$4,927 | Net after 1 year | -$9,796 |
| -$6,854 | Net after 2 years | -$10,093 |
| -$8,781 | Net after 3 years | -$10,389 |
| 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 E9 Pro 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 $-0.81/day compared to $-5.28/day for the Antminer E9 Pro. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Antminer E9 Pro or the Antminer S21 Hydro better for noise-sensitive spaces?
The Antminer S21 Hydro is quieter at 50 dB compared to the Antminer E9 Pro at 75 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Antminer E9 Pro or the Antminer S21 Hydro?
The Antminer S21 Hydro scores 44/100 on our Home Mining Score (vs 40/100 for the Antminer E9 Pro). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Antminer E9 Pro and Antminer S21 Hydro on J/TH?
The Antminer E9 Pro runs at 597,826.1 J/TH while the Antminer S21 Hydro runs at 16.0 J/TH — a difference of 597,810.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 100% better efficacité (597,826.1 vs 16.0 J/TH).