SealMiner A4 Pro Air vs S21 Hyd
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3662 W | 5360 W | |
| Release | 2026-05 | 2024-02 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $7.18 | $3.88 | |
| Score | 77/100 | 72/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | SealMiner A4 Pro Air | S21 Hyd | |
|---|---|---|---|
| SHA-256 | 336 TH/s3662 W · 91.75 GH/s/W | 335 TH/s5360 W · 62.5 GH/s/W |