X3 vs A21
Side-by-side mining comparison: specs, per-algorithm benchmarks, efficiency and current profitability.
| Type | ASIC | ASIC | |
| Power | 470 W | 1800 W | |
| Release | 2018-05 | 2025-01 | |
| Best opportunity |  NEXNetwork | ||
| Profit/day | $4.91 | ||
| Score | 70/100 | ||
| View details → | View details → |
Benchmarks by algorithm
Best available benchmark per device; efficiency = hashrate per watt.
| Algorithm | X3 | A21 | |
|---|---|---|---|
| CryptoNight | 220 kH/s470 W · 468.1 H/s/W | not supported | |
| NexaPoW | not supported | 3.4 GH/s1800 W · 1.889 MH/s/W |