A21 vs X2
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 1800 W | 980 W | |
| Release | 2025-01 | 2019-06 | |
| Best opportunity |  NEXNetwork | ||
| Profit/day | $4.79 | ||
| Score | 69/100 | ||
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | A21 | X2 | |
|---|---|---|---|
| Blake (2s) | not supported | 1.2 TH/s980 W · 1.224 GH/s/W | |
| Keccak | not supported | 75 GH/s980 W · 76.53 MH/s/W | |
| Myr-Groestl | not supported | 300 GH/s980 W · 306.1 MH/s/W | |
| NexaPoW | 3.4 GH/s1800 W · 1.889 MH/s/W | not supported |