Antminer S21+ (225Th) vs Antminer S9 Hydro (18Th)
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3712 W | 1728 W | |
| Release | 2025-06 | 2018-08 | |
| Best opportunity |  BCHNetwork |  BTCNetwork | |
| Profit/day | $0.58 | $-2.70 | |
| Score | 67/100 | 49/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | Antminer S21+ (225Th) | Antminer S9 Hydro (18Th) | |
|---|---|---|---|
| SHA-256 | 225 TH/s3712 W · 60.61 GH/s/W | 18 TH/s1728 W · 10.42 GH/s/W |