SealMiner A3 Hydro vs Antminer S21 (200Th)
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 6750 W | 3500 W | |
| Release | 2025-09 | 2024-02 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $8.89 | $2.02 | |
| Score | 75/100 | 71/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | SealMiner A3 Hydro | Antminer S21 (200Th) | |
|---|---|---|---|
| SHA-256 | 500 TH/s6750 W · 74.07 GH/s/W | 200 TH/s3500 W · 57.14 GH/s/W |