A21 vs WhatsMiner M66S+
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 1800 W | 5406 W | |
| Release | 2025-01 | 2024-09 | |
| Best opportunity |  NEXANetwork |  BTCNetwork | |
| Profit/day | $2.09 | $2.98 | |
| Score | 62/100 | 70/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.