A21 vs STU-U2
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 1800 W | 1600 W | |
| Release | 2025-01 | 2018-10 | |
| Best opportunity |  NEXNetwork |  SCNetwork | |
| Profit/day | $4.86 | $-0.80 | |
| Score | 70/100 | 38/100 | |
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | A21 | STU-U2 | |
|---|---|---|---|
| Blake (2b) | not supported | 7 TH/s1600 W · 4.375 GH/s/W | |
| NexaPoW | 3.4 GH/s1800 W · 1.889 MH/s/W | not supported |