STU-U2 vs A21
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 1600 W | 1800 W | |
| Release | 2018-10 | 2025-01 | |
| Best opportunity |  SCNetwork |  NEXNetwork | |
| Profit/day | $-0.91 | $4.88 | |
| Score | 37/100 | 70/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | STU-U2 | A21 | |
|---|---|---|---|
| Blake (2b) | 7 TH/s1600 W · 4.375 GH/s/W | not supported | |
| NexaPoW | not supported | 3.4 GH/s1800 W · 1.889 MH/s/W |