Bitmain Antminer S9 (13.5Th) vs Bitdeer SealMiner A3 Air
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S9 (13.5Th) | Specification | Bitdeer SealMiner A3 Air |
|---|---|---|
| 13.5 TH/s | Hashrate | 260.0 TH/s |
| 1,323 W | Power Consumption | 3,640 W |
| 98.0 J/TH | Efficiency | 14.0 J/TH |
| — | Noise Level | 75 dB |
| 4,200.0 kg | Weight | 15.5 kg |
| 4,514 BTU/hr | BTU Output | 12,420 BTU/hr |
| 31/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitdeer |
Profitability Comparison
Bitmain Antminer S9 (13.5Th)
Bitdeer SealMiner A3 Air
Based on BTC price of $79,090 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitdeer SealMiner A3 Air wins on 3 of 6 factors (efficiency, hashrate, noise level). Its biggest concrete edge: 1826% more hashrate (13.5 vs 260.0 TH/s). The Bitmain Antminer S9 (13.5Th) claws back ground on power consumption and home mining score and price-performance. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer S9 (13.5Th) and Bitdeer SealMiner A3 Air sit on each measurable spec:
- Bitdeer SealMiner A3 Air 1826% more hashrate (13.5 vs 260.0 TH/s)
- Bitmain Antminer S9 (13.5Th) 64% better power draw (1,323 vs 3,640 W)
- Bitdeer SealMiner A3 Air 86% better efficiency (98.0 vs 14.0 J/TH)
- Bitdeer SealMiner A3 Air 100% better weight (4,200.0 vs 15.5 kg)
- Bitdeer SealMiner A3 Air 175% more heat output (4,514 vs 12,420 BTU/hr)
- Bitmain Antminer S9 (13.5Th) 3% more home mining score (31.0 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 S9 (13.5Th) | Metric | Bitdeer SealMiner A3 Air |
|---|---|---|
| $65 | Upfront cost (MSRP) | $3,900 |
| -$2.68 | Daily net profit | $0.73 |
| -$1,045 | Net after 1 year | -$3,635 |
| -$2,024 | Net after 2 years | -$3,369 |
| -$3,004 | Net after 3 years | -$3,104 |
| Does not pay back at current rates (negative daily profit) | Payback period | Takes ~14.7 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$3.41/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S9 (13.5Th)Score: 31/100. 0 dB noise level.
Best for Efficiency
Bitdeer SealMiner A3 Air14.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S9 (13.5Th) vs Bitdeer SealMiner A3 Air: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A3 Air is more profitable at $0.73/day compared to $-2.68/day for the Bitmain Antminer S9 (13.5Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S9 (13.5Th) 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 S9 (13.5Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S9 (13.5Th) or Bitdeer SealMiner A3 Air?
The Bitmain Antminer S9 (13.5Th) scores 31/100 on our Home Mining Score (vs 30/100 for the Bitdeer SealMiner A3 Air). 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 (13.5Th) and Bitdeer SealMiner A3 Air on J/TH?
The Bitmain Antminer S9 (13.5Th) runs at 98.0 J/TH while the Bitdeer SealMiner A3 Air runs at 14.0 J/TH — a difference of 84.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 86% better efficiency (98.0 vs 14.0 J/TH).
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