Antminer K7 (63.5Th) vs A21
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3080 W | 1800 W | |
| Release | 2023-01 | 2025-01 | |
| Best opportunity |  CKBNetwork |  NEXANetwork | |
| Profit/day | $0.90 | $2.36 | |
| Score | 68/100 | 63/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.