WhatsMiner M66S vs SealMiner A4 Ultra Hydro
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 5513 W | 8372 W | |
| Release | 2023-11 | 2026-05 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $1.83 | $20.85 | |
| Score | 69/100 | 79/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | WhatsMiner M66S | SealMiner A4 Ultra Hydro | |
|---|---|---|---|
| SHA-256 | 298 TH/s5513 W · 54.05 GH/s/W | 886 TH/s8372 W · 105.8 GH/s/W |