Bitmain Antminer S9 Hydro (18Th) vs Bitdeer SealMiner A3 Pro Hydro
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S9 Hydro (18Th) | Specification | Bitdeer SealMiner A3 Pro Hydro |
|---|---|---|
| 18.0 TH/s | Taux de hachage | 660.0 TH/s |
| 1,728 W | Consommation électrique | 8,250 W |
| 96.0 J/TH | Efficiency | 12.5 J/TH |
| — | Niveau de bruit | 50 dB |
| 5,150.0 kg | Weight | 20.5 kg |
| 5,896 BTU/hr | BTU Output | 28,149 BTU/hr |
| 28/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitdeer |
Profitability Comparison
Bitmain Antminer S9 Hydro (18Th)
Bitdeer SealMiner A3 Pro Hydro
Based on BTC price of $78,171 and current network difficulty as of May 17, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitdeer SealMiner A3 Pro Hydro, which leads on 4 of 5 weighted factors (efficacité, hashrate, score de minage domestique, niveau sonore). Where it pulls away hardest is 3567% more hashrate (18.0 vs 660.0 TH/s). That said, the Bitmain Antminer S9 Hydro (18Th) isn't beaten everywhere — it still wins consommation électrique. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
The Bitmain Antminer S9 Hydro (18Th) and Bitdeer SealMiner A3 Pro Hydro diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitdeer SealMiner A3 Pro Hydro 3567% more hashrate (18.0 vs 660.0 TH/s)
- Bitmain Antminer S9 Hydro (18Th) 79% better power draw (1,728 vs 8,250 W)
- Bitdeer SealMiner A3 Pro Hydro 87% better efficacité (96.0 vs 12.5 J/TH)
- Bitdeer SealMiner A3 Pro Hydro 100% better weight (5,150.0 vs 20.5 kg)
- Bitdeer SealMiner A3 Pro Hydro 377% more heat output (5,896 vs 28,149 BTU/hr)
- Bitdeer SealMiner A3 Pro Hydro 57% more score de minage domestique (28.0 vs 44.0)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Bitmain Antminer S9 Hydro (18Th) | Metric | Bitdeer SealMiner A3 Pro Hydro |
|---|---|---|
| — | Upfront cost (MSRP) | $7,995 |
| -$3.50 | Daily net profit | $3.94 |
| -$1,277 | Net after 1 year | -$6,556 |
| -$2,555 | Net after 2 years | -$5,117 |
| -$3,832 | Net after 3 years | -$3,678 |
| — | Payback period | Takes ~5.6 years to pay back at current rates |
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
Bitdeer SealMiner A3 Pro Hydro$7.44/day higher profit at current rates.
Best for Home Mining
Bitdeer SealMiner A3 Pro HydroScore: 44/100. 50 dB noise level.
Best for Efficiency
Bitdeer SealMiner A3 Pro Hydro12.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S9 Hydro (18Th) vs Bitdeer SealMiner A3 Pro Hydro: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A3 Pro Hydro is more profitable at $3.94/day compared to $-3.50/day for the Bitmain Antminer S9 Hydro (18Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S9 Hydro (18Th) vs Bitdeer SealMiner A3 Pro Hydro: which runs at a lower noise level?
The Bitdeer SealMiner A3 Pro Hydro is quieter at 50 dB compared to the Bitmain Antminer S9 Hydro (18Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Bitmain Antminer S9 Hydro (18Th) or the Bitdeer SealMiner A3 Pro Hydro?
The Bitdeer SealMiner A3 Pro Hydro scores 44/100 on our Home Mining Score (vs 28/100 for the Bitmain Antminer S9 Hydro (18Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Bitmain Antminer S9 Hydro (18Th) and Bitdeer SealMiner A3 Pro Hydro on J/TH?
The Bitmain Antminer S9 Hydro (18Th) runs at 96.0 J/TH while the Bitdeer SealMiner A3 Pro Hydro runs at 12.5 J/TH — a difference of 83.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 87% better efficacité (96.0 vs 12.5 J/TH).
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