Bitmain Antminer S19j Pro (104Th) vs Bitdeer SealMiner A2 Pro Air
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S19j Pro (104Th) | Specification | Bitdeer SealMiner A2 Pro Air |
|---|---|---|
| 104.0 TH/s | Hashrate | 255.0 TH/s |
| 3,068 W | Power Consumption | 3,790 W |
| 29.5 J/TH | Efficiency | 14.9 J/TH |
| — | Noise Level | 75 dB |
| 13,200.0 kg | Weight | 15.5 kg |
| 10,468 BTU/hr | BTU Output | 12,932 BTU/hr |
| 22/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitdeer |
Profitability Comparison
Bitmain Antminer S19j Pro (104Th)
Bitdeer SealMiner A2 Pro Air
Based on BTC price of $79,051 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitdeer SealMiner A2 Pro Air comes out ahead — it takes 4 of 6 (efficiency, hashrate, home mining score, noise level). The standout gap is 145% more hashrate (104 vs 255 TH/s) in the Bitdeer SealMiner A2 Pro Air's favour. That said, the Bitmain Antminer S19j Pro (104Th) isn't beaten everywhere — it still wins power consumption 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 S19j Pro (104Th) and Bitdeer SealMiner A2 Pro Air sit on each measurable spec:
- Bitdeer SealMiner A2 Pro Air 145% more hashrate (104 vs 255 TH/s)
- Bitmain Antminer S19j Pro (104Th) 19% better power draw (3,068 vs 3,790 W)
- Bitdeer SealMiner A2 Pro Air 50% better efficiency (29.5 vs 14.9 J/TH)
- Bitdeer SealMiner A2 Pro Air 100% better weight (13,200.0 vs 15.5 kg)
- Bitdeer SealMiner A2 Pro Air 24% more heat output (10,468 vs 12,932 BTU/hr)
- Bitdeer SealMiner A2 Pro Air 36% more home mining score (22.0 vs 30.0)
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.
| Bitmain Antminer S19j Pro (104Th) | Metric | Bitdeer SealMiner A2 Pro Air |
|---|---|---|
| $398 | Upfront cost (MSRP) | $4,000 |
| -$3.58 | Daily net profit | $0.18 |
| -$1,705 | Net after 1 year | -$3,934 |
| -$3,011 | Net after 2 years | -$3,868 |
| -$4,318 | Net after 3 years | -$3,802 |
| Does not pay back at current rates (negative daily profit) | Payback period | Takes ~60.8 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 A2 Pro Air$3.76/day higher profit at current rates.
Best for Home Mining
Bitdeer SealMiner A2 Pro AirScore: 30/100. 75 dB noise level.
Best for Efficiency
Bitdeer SealMiner A2 Pro Air14.9 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S19j Pro (104Th) or Bitdeer SealMiner A2 Pro Air more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A2 Pro Air is more profitable at $0.18/day compared to $-3.58/day for the Bitmain Antminer S19j Pro (104Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S19j Pro (104Th) vs Bitdeer SealMiner A2 Pro Air: which runs at a lower noise level?
The Bitdeer SealMiner A2 Pro Air is quieter at 75 dB compared to the Bitmain Antminer S19j Pro (104Th) 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 S19j Pro (104Th) or the Bitdeer SealMiner A2 Pro Air?
The Bitdeer SealMiner A2 Pro Air scores 30/100 on our Home Mining Score (vs 22/100 for the Bitmain Antminer S19j Pro (104Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer S19j Pro (104Th) vs Bitdeer SealMiner A2 Pro Air: how much does the efficiency gap matter?
The Bitmain Antminer S19j Pro (104Th) runs at 29.5 J/TH while the Bitdeer SealMiner A2 Pro Air runs at 14.9 J/TH — a difference of 14.6 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 50% better efficiency (29.5 vs 14.9 J/TH).
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