AvalonMiner 821 vs Whatsminer M21
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 1200 W | 1860 W | |
| Release | 2018-02 | 2019-08 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $-1.83 | $-2.29 | |
| Score | 49/100 | 49/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | AvalonMiner 821 | Whatsminer M21 | |
|---|---|---|---|
| SHA-256 | 11.5 TH/s1200 W · 9.583 GH/s/W | 31 TH/s1860 W · 16.67 GH/s/W |