SealMiner A3 Pro Air vs Whatsminer M21S
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3625 W | 3360 W | |
| Release | 2025-09 | 2019-06 | |
| Best opportunity |  BTCNetwork |  BCHNetwork | |
| Profit/day | $5.28 | $-4.36 | |
| Score | 75/100 | 49/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | SealMiner A3 Pro Air | Whatsminer M21S | |
|---|---|---|---|
| SHA-256 | 290 TH/s3625 W · 80 GH/s/W | 56 TH/s3360 W · 16.67 GH/s/W |