WhatsMiner M66S vs SealMiner A3 Hydro
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 5513 W | 6750 W | |
| Release | 2023-11 | 2025-09 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $0.84 | $6.22 | |
| Score | 67/100 | 73/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | WhatsMiner M66S | SealMiner A3 Hydro | |
|---|---|---|---|
| SHA-256 | 298 TH/s5513 W · 54.05 GH/s/W | 500 TH/s6750 W · 74.07 GH/s/W |