Bitmain Antminer T9 (12.5Th) vs Bitdeer SealMiner A3 Air
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer T9 (12.5Th) | Specification | Bitdeer SealMiner A3 Air |
|---|---|---|
| 12.5 TH/s | Taux de hachage | 260.0 TH/s |
| 1,576 W | Consommation électrique | 3,640 W |
| 126.1 J/TH | Efficiency | 14.0 J/TH |
| — | Niveau de bruit | 75 dB |
| 3,800.0 kg | Weight | 15.5 kg |
| 5,377 BTU/hr | BTU Output | 12,420 BTU/hr |
| 28/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitdeer |
Profitability Comparison
Bitmain Antminer T9 (12.5Th)
Bitdeer SealMiner A3 Air
Based on BTC price of $78,293 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitdeer SealMiner A3 Air edges it: 5 of 6 factors go its way (efficacité, hashrate, score de minage domestique, niveau sonore, rapport qualité-prix). The standout gap is 1980% more hashrate (12.5 vs 260.0 TH/s) in the Bitdeer SealMiner A3 Air's favour. The Bitmain Antminer T9 (12.5Th) claws back ground on consommation électrique. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
The Bitmain Antminer T9 (12.5Th) and Bitdeer SealMiner A3 Air diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitdeer SealMiner A3 Air 1980% more hashrate (12.5 vs 260.0 TH/s)
- Bitmain Antminer T9 (12.5Th) 57% better power draw (1,576 vs 3,640 W)
- Bitdeer SealMiner A3 Air 89% better efficacité (126.1 vs 14.0 J/TH)
- Bitdeer SealMiner A3 Air 100% better weight (3,800.0 vs 15.5 kg)
- Bitdeer SealMiner A3 Air 131% more heat output (5,377 vs 12,420 BTU/hr)
- Bitdeer SealMiner A3 Air 7% more score de minage domestique (28.0 vs 30.0)
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.
| Bitmain Antminer T9 (12.5Th) | Metric | Bitdeer SealMiner A3 Air |
|---|---|---|
| $1,100 | Upfront cost (MSRP) | $3,900 |
| -$3.33 | Daily net profit | $0.63 |
| -$2,316 | Net after 1 year | -$3,669 |
| -$3,532 | Net after 2 years | -$3,439 |
| -$4,749 | Net after 3 years | -$3,208 |
| Does not pay back at current rates (negative daily profit) | Payback period | Takes ~16.9 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 Air$3.96/day higher profit at current rates.
Best for Home Mining
Bitdeer SealMiner A3 AirScore: 30/100. 75 dB noise level.
Best for Efficiency
Bitdeer SealMiner A3 Air14.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer T9 (12.5Th) or Bitdeer SealMiner A3 Air more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A3 Air is more profitable at $0.63/day compared to $-3.33/day for the Bitmain Antminer T9 (12.5Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer T9 (12.5Th) vs Bitdeer SealMiner A3 Air: which runs at a lower noise level?
The Bitdeer SealMiner A3 Air is quieter at 75 dB compared to the Bitmain Antminer T9 (12.5Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Bitmain Antminer T9 (12.5Th) vs Bitdeer SealMiner A3 Air: which fits a residential setup better?
The Bitdeer SealMiner A3 Air scores 30/100 on our Home Mining Score (vs 28/100 for the Bitmain Antminer T9 (12.5Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer T9 (12.5Th) vs Bitdeer SealMiner A3 Air: how much does the efficiency gap matter?
The Bitmain Antminer T9 (12.5Th) runs at 126.1 J/TH while the Bitdeer SealMiner A3 Air runs at 14.0 J/TH — a difference of 112.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 89% better efficacité (126.1 vs 14.0 J/TH).
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