U2 vs SealMiner A4 Ultra Hydro
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 1600 W | 8372 W | |
| Release | 2018-09 | 2026-05 | |
| Best opportunity |  SCNetwork |  BTCNetwork | |
| Profit/day | $6.43 | $20.45 | |
| Score | 60/100 | 78/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | U2 | SealMiner A4 Ultra Hydro | |
|---|---|---|---|
| Blake (2b) | 5.5 TH/s1600 W · 3.438 GH/s/W | not supported | |
| SHA-256 | not supported | 886 TH/s8372 W · 105.8 GH/s/W |