SealMiner A3 Air vs Antminer S21 Immersion (301Th)
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3640 W | 5569 W | |
| Release | 2025-09 | 2024-12 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $3.82 | $2.34 | |
| Score | 73/100 | 71/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | SealMiner A3 Air | Antminer S21 Immersion (301Th) | |
|---|---|---|---|
| SHA-256 | 260 TH/s3640 W · 71.43 GH/s/W | 215 TH/s3440 W · 62.5 GH/s/W |