SealMiner A2 vs AvalonMiner 821
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3730 W | 1200 W | |
| Release | 2025-03 | 2018-02 | |
| Best opportunity |  BTCNetwork |  BCHNetwork | |
| Profit/day | $2.63 | $-1.88 | |
| Score | 71/100 | 49/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | SealMiner A2 | AvalonMiner 821 | |
|---|---|---|---|
| SHA-256 | 226 TH/s3730 W · 60.59 GH/s/W | 11.5 TH/s1200 W · 9.583 GH/s/W |