Antminer S21+ (235Th) vs X4
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3877 W | 1200 W | |
| Release | 2025-06 | 2021-11 | |
| Best opportunity |  BTCNetwork |  QKCNetwork | |
| Profit/day | $2.11 | $0.13 | |
| Score | 70/100 | 61/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.