Antminer S21+ (235Th) vs STU-U2
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 3877 W | 1600 W | |
| Release | 2025-06 | 2018-10 | |
| Best opportunity |  BTCNetwork |  SCPNetwork | |
| Profit/day | $2.41 | $-2.79 | |
| Score | 71/100 | 33/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | Antminer S21+ (235Th) | STU-U2 | |
|---|---|---|---|
| Blake (2b) | not supported | 7 TH/s1600 W · 4.375 GH/s/W | |
| SHA-256 | 235 TH/s3877 W · 60.61 GH/s/W | not supported |