WhatsMiner M66S vs AvalonMiner 821
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 5513 W | 1200 W | |
| Release | 2023-11 | 2018-02 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $1.76 | $-1.83 | |
| Score | 68/100 | 49/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | WhatsMiner M66S | AvalonMiner 821 | |
|---|---|---|---|
| SHA-256 | 298 TH/s5513 W · 54.05 GH/s/W | 11.5 TH/s1200 W · 9.583 GH/s/W |