Antminer S21 Plus vs SealMiner A3 Air
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3564 W | 3640 W | |
| Release | 2025-06 | 2025-09 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $2.18 | $3.87 | |
| Score | 71/100 | 74/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | Antminer S21 Plus | SealMiner A3 Air | |
|---|---|---|---|
| SHA-256 | 216 TH/s3564 W · 60.61 GH/s/W | 260 TH/s3640 W · 71.43 GH/s/W |