Antminer S19j (90Th) vs A21
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3250 W | 1800 W | |
| Release | 2021-06 | 2025-01 | |
| Best opportunity |  BTCNetwork |  NEXNetwork | |
| Profit/day | $-2.58 | $4.90 | |
| Score | 54/100 | 70/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.