Antminer S21j XP Hyd (495Th) vs X4
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 5940 W | 1200 W | |
| Release | 2026-03 | 2021-11 | |
| Best opportunity |  BTCNetwork |  QKCNetwork | |
| Profit/day | $9.16 | $0.19 | |
| Score | 76/100 | 63/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.