Antminer S21+ (225Th) vs A9 ZMaster
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3712 W | 620 W | |
| Release | 2025-06 | 2018-06 | |
| Best opportunity |  BTCNetwork |  ZECNetwork | |
| Profit/day | $1.84 | $1.93 | |
| Score | 70/100 | 80/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.