Bitmain Antminer S3 vs Bitdeer SealMiner A2 Pro Air
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S3 | Specification | Bitdeer SealMiner A2 Pro Air |
|---|---|---|
| 478.0 GH/s | Hashrate | 255.0 TH/s |
| 366 W | Power Consumption | 3,790 W |
| 765.7 J/TH | Efficiency | 14.9 J/TH |
| — | Noise Level | 75 dB |
| 5,200.0 kg | Weight | 15.5 kg |
| 1,249 BTU/hr | BTU Output | 12,932 BTU/hr |
| 34/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitdeer |
Profitability Comparison
Bitmain Antminer S3
Bitdeer SealMiner A2 Pro Air
Based on BTC price of $79,090 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitdeer SealMiner A2 Pro Air edges it: 3 of 5 factors go its way (efficiency, hashrate, noise level). Where it pulls away hardest is 53247% more hashrate (0.5 vs 255.0 TH/s). That said, the Bitmain Antminer S3 isn't beaten everywhere — it still wins power consumption and home mining score. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Bitmain Antminer S3 and Bitdeer SealMiner A2 Pro Air diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitdeer SealMiner A2 Pro Air 53247% more hashrate (0.5 vs 255.0 TH/s)
- Bitmain Antminer S3 90% better power draw (366 vs 3,790 W)
- Bitdeer SealMiner A2 Pro Air 98% better efficiency (765.7 vs 14.9 J/TH)
- Bitdeer SealMiner A2 Pro Air 100% better weight (5,200.0 vs 15.5 kg)
- Bitdeer SealMiner A2 Pro Air 936% more heat output (1,249 vs 12,932 BTU/hr)
- Bitmain Antminer S3 13% more home mining score (34.0 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 S3 | Metric | Bitdeer SealMiner A2 Pro Air |
|---|---|---|
| — | Upfront cost (MSRP) | $4,000 |
| -$0.86 | Daily net profit | $0.18 |
| -$314 | Net after 1 year | -$3,932 |
| -$629 | Net after 2 years | -$3,865 |
| -$943 | Net after 3 years | -$3,797 |
| — | Payback period | Takes ~59.3 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$1.05/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S3Score: 34/100. 0 dB noise level.
Best for Efficiency
Bitdeer SealMiner A2 Pro Air14.9 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S3 or the Bitdeer SealMiner A2 Pro Air?
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 $-0.86/day for the Bitmain Antminer S3. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S3 or Bitdeer SealMiner A2 Pro Air?
The Bitdeer SealMiner A2 Pro Air is quieter at 75 dB compared to the Bitmain Antminer S3 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 S3 or the Bitdeer SealMiner A2 Pro Air?
The Bitmain Antminer S3 scores 34/100 on our Home Mining Score (vs 30/100 for the Bitdeer SealMiner A2 Pro 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 S3 and Bitdeer SealMiner A2 Pro Air on J/TH?
The Bitmain Antminer S3 runs at 765.7 J/TH while the Bitdeer SealMiner A2 Pro Air runs at 14.9 J/TH — a difference of 750.8 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 98% better efficiency (765.7 vs 14.9 J/TH).
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