Antminer S21+ (235Th) vs Antminer S9i (13Th)
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3877 W | 1290 W | |
| Release | 2025-06 | 2018-05 | |
| Best opportunity |  BTCNetwork | BTCNetwork | |
| Profit/day | $2.58 | $-1.92 | |
| Score | 71/100 | 49/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | Antminer S21+ (235Th) | Antminer S9i (13Th) | |
|---|---|---|---|
| SHA-256 | 235 TH/s3877 W · 60.61 GH/s/W | 13 TH/s1290 W · 10.08 GH/s/W |