SealMiner A4 Ultra Hydro vs L21
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 8372 W | 950 W | |
| Release | 2026-05 | 2018-01 | |
| Best opportunity |  BTCNetwork |  LTCNetwork | |
| Profit/day | $21.81 | $-1.77 | |
| Score | 79/100 | 49/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.