Antminer S21 Immersion vs SealMiner A3 Pro Air
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 5569 W | 3625 W | |
| Release | 2025-09 | ||
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $-0.88 | $2.49 | |
| Score | 64/100 | 71/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | Antminer S21 Immersion | SealMiner A3 Pro Air | |
|---|---|---|---|
| SHA-256 | 301 TH/s5569 W · 54.05 GH/s/W | 290 TH/s3625 W · 80 GH/s/W |